math problem got me stumped horribly!! please help.?

Question

i'm supposed to solve for x and y.

here is the problem

5-y=3x
y=2x

i don't understand it at all.
what so ever.

please help me.

please.

Answer 1

You have a value for y in terms of x in the second equation. This allows you to directly subtitute into the first equation:

5 - (2x) = 3x
5 - 2x = 3x
5 = 5x
x = 1

Since x = 1 and y = 2 x, y = 2

Answer 2

There are three different methods to solve this answer.
You can choose elimination, substitution or graphing.

If you ask my opinion, I'd do substitution. Substitute the 2x into the first equation since y = 2x.

You'll have 5 - 2x = 3x. Then, solve for x by adding 2x on both sides. You'll end up with 5 = 5x. Divide both sides by 5 and you'll get x = 1. After that, you can go back to your 2nd equation (y = 2x) and replace x with its value. Thus, you'll have y = 2 * 1 or 2.

The answer is then (1, 2).

Answer 3

Use substitution. Since y = 2x by the second equation, you can substitute y with 2x in the first equation, giving you
5 - 2x = 3x

You can now solve this for x. Once you have x, you can use the value of x in either of the two original equations and solve the result for y.

5 = 2x + 3x
5 = 5x
x = 1

y = 2x
y = 2(1)
y = 2

So the solution is x=1, y=2

Answer 4

start up by utilising allotting the three into the x-4. To distribute, you're taking the quantity on the outdoors of the parentheses (3) and multiply it by utilising the separate values on the interior (x) (-4). three times x equals 3x. three times -4 is -12. integrate the values. you're actually left with 3x-12. Your equation now feels like this: x + 8 = 3x - 12 Now you will be able to desire to get all the x values on a similar element: x + 8 = 3x - 12 -1x -1x 8 = 2x - 12 (From right here i think you be attentive to the thank you to resolve it, yet nevertheless) +12 + 12 20 = 2x /2 /2 10=x nicely, it particularly is the respond. Sorry if I perplexed you.

Answer 5

This is what is known as a system of equations and can be solved by the substitution method. You must take the "2x" (which is equal to "y") and substitute it in place of the "y" in the first equation.
It will look like this: 5-2x=3x

Now you can solve for "x"
Once you find the value of "x", you can plug that value into the second equation and solve for "y"
You will have two answers.........x=____ & y=____

Answer 6

First: substitute "2x" with "y" in the 1st equation.

5 - y = 3x
5 - 2x = 3x, or 3x = 5 - 2x

Sec: combine "like" terms - add 2x to both sides (when you move a term to the opposite side, always use the opposite sign).

3x+2x = 5 - 2x+2x
3x+2x = 5
5x = 5 (solve for x - divide both side by 5).
5x/5 = 5/5
x = 5/5
x = 1

Third: substitute 1 with "x" in the 2nd equation.

y = 2x
y = 2(1)
y = 2

Solution: (1, 2)

Answer 7

Okay, solve for one of the intergers first. Lets solve for x first.
Plug y=2x into the first equation.

5-2x=3x
to get -2x to the other side, add it to both sides.
5-2x+2x=3x+2x
2x cancels out on the left side and adds to the right side
5=5x
Now, get x by itself by dividing 5 on both sides.
5/5=5x/5
1=x

Now take the value of x and plug it into one of the equations. The easiest on looks like y=2x.

So:
y=2(1)
y=2

Just to double check and make sure it works, try plugging in y into the other equation.

5-2=3(1)
3=3
so:
x=1
and
y=2

Good luck and keep practicing.

Answer 8

5-y=3x
y=2x


You have y = 2x so substitute 2x in the 1st equation for y.

5 - y = 3x, becomes
5 - 2x = 3x, add 3x to both sides
5 = 5x
1 = x

now if y = 2x and x = 1 then y = 2

Answer 9

Since y=2x, you can plug that in for y in the first equation.
So now it will be: 5-2x=3x.
Add 2x to both sides so 5=5x.
Divide by 5 so x=1.
Then for the second equation you know what x is now so plug it in. y=2(1).
y=2.

Answer 10

Well, duh, let's see what we have here. Reason this out.

If y=2x, then everywhere you see a "y" it is the same as 2x. With this thought in mind, the equation 5-y=3x is actually the same thing as 5-2x=3x.

So, if you add 2x to each side of the equation you have
5-2x+2x= 3x+2x (If you add equals to equals the result is still equal)

Since -2x+2x effectively cancells itself out and equals nothing, you can simplify it to
5=3x+2x, and adding the 3x+2x together you get 5=5x, which means that x=1.

So if 5-y=3, then y=2.

x=1 and y=2

So easy a caveman can do it.