Step-by-step, how do you solve this system by substitution?
y=4x+6
y=5x
I'm having trouble. Please help.
2007-01-20 13:43:52 · 12 answers · asked by CaliGurl♥ 6 in Education & Reference ➔ Homework Help
Then does y=0?
2007-01-20 13:50:50 · update #1
Since you are given the two equations y=4x+6 and y=5x, they both are equal to y right? So, you can substitute 4x+6 into the equation y=5x for y right? Therefore, you get
4x+6 = 5x
Subtract 4x from both sides
6=x
You can also do it by substituting 5x for y in the equation y=4x+6
5x = 4x+6
Subtract 4x from both sides
x=6
Hope this helps!
2007-01-20 13:54:57 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Y = 4x + 6 when Y = 5x
5x = 4x + 6
[subtract so that you have the variable on only one side]
5x [-4x] = 4x[-4x] +6
x = 6
If x = 6, then:
Y = 4[6] + 6
Y = 24 + 6
Y = 30
OR
Y = 5[6]
Y = 30
2007-01-20 21:57:33 · answer #2 · answered by badactorsxplaytragic 1 · 0⤊ 0⤋
Step 1. 5x=4x+6
Step 2. 5x-4x=6
Step 3. x=6
2007-01-20 21:49:58 · answer #3 · answered by lrandf 1 · 0⤊ 0⤋
y=4x+6
y=5x
Equating the two expressions for y, we get:
5x=4x+6. It is also equivalent to sustituting for y from the second equation into the first. This leads to x=6.
Putting this value of x in, say, the second equation, we get:
y =30
Answer: x=6,y=30.
Verify that the answer satisfies the two equations.
2007-01-20 21:55:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Well you would substitute 5x for the y. 5x=4x+6. Then you have to get the x's on the same side, so subtract 4x out of both sides. And then you have the answer.
2007-01-20 21:48:09 · answer #5 · answered by ♥Catherine♥ 4 · 0⤊ 0⤋
Take the value for y in the second equation and plug it into the first equation. 5x = 4x + 6. Now, you isolate the variable and solve for x. 0 = -x + 6. -6 = -x. x=6.
2007-01-20 21:48:57 · answer #6 · answered by stephieSD 7 · 0⤊ 0⤋
y= 4x+6 Replace the Y with what it equals
5x=4x+6 Get both Variables on one side by useing the opposite of addition. What you do to one side of the equals sign you do to the other side.
-4x=-4x (5x-4x=1x) (4x-4x=0)
x=6
2007-01-20 21:50:53 · answer #7 · answered by herminegranger2003 2 · 0⤊ 0⤋
y=4x+6
substitute y for 5x
so 5x=4x+6
-4x -4x
x=6
plug in 6 for x in either problem
y=4(6)+6 or y=5(6)
y=24+6 or y=30
y=30
so the answer would be (6,30)
or x=6 and y=30
hope i helped
im in algabra 1 part 1 now
2007-01-20 22:07:30 · answer #8 · answered by monkey 1 · 0⤊ 0⤋
y=5x so..
5x = 4x+6
-4x -4x
1x = 6
x = 6 so..
y= 5x
y = 5 x 6
y = 30
2007-01-21 02:50:06 · answer #9 · answered by Cora 2 · 0⤊ 0⤋
If y=5x then 5x=4x+6
solve:
5x-4x=4x-4x+6
x=6
2007-01-20 21:47:40 · answer #10 · answered by gpwarren98 3 · 1⤊ 0⤋