friend needs help with a question. anyone good at algebra?

Question

-y -4 = -2
x -2y = -3
anyone know value of x and y ?
thanks for help in advance.

Answer 1

-y-4=-2
-y=-2+4
-y=2
Then y= -2

If y=-2

then:
x-2y= -3
x-2(-2)= -3
x+4= -3
x= -3-4
x= -7

Answer 2

- y - 4 = - 2 - - - - - - - - -Equation 1
x - 2y = - 3 - - - - - - - - - -Equation 2

- - - - - - - - - - - - - - - -
Solving for y equation 1

- y - 4 = - 2

- y - 4 + 4 = - 2 + 4

- y = 2

-1y/-1 = 2/- 1

y coefficient is 1

y = - 2

The solution set is { - 2 }

Insert the y value into equation 1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Check for equation 1

- y - 4 = - 2

- ( - 2 ) - 4 = - 2

2 - 4 = - 2

- 2 = - 2

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Solving for x equation 2

x - 2y = -3

x - 2( - 2) = - 3

x + 4 = - 3

x + 4 - 4 = - 3 - 4

x = - 7

The solution set is { - 7 }

Insert the x value into equation 2

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Check for equation 2

x - 2 y = - 3

- 7 - 2( - 2 ) = - 3

- 7 + 4 = - 3

- 3 = - 3

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

The answer is

y = -2

x = -7

Answer 3

-y-4=-2
add 4 on both sides
-y=2
dived by -1 on both sides
y=-2

x-2y=-3
subsitute y for -2
x-2(-2)=-3
multiply
x+4=-3
subtract
x=-7

Answer 4

this is a problem that requires you to solve for one variable at a time. take the first equation -y-4=-2. add 4 to both sides of the equal sign. you get -y = 2. then divide by negative 1 to both sides to get y = -2. take y= -2 and substitute it into the y variable in the second equation like this: x-2(-2) = -3. simplify it into x +4 = -3. then subtract 4 to both sides. x= -7.

x = -7, y = -2

you can check your answer by plugging in -2 into the first equation. -(-2) - 4 = -2. or you can plug in -7 for x and -2 for y into the second equation. (-7) - 2(-2) = -3

Just remember the basics for multiplying and dividing positive and negative numbers:
(+)(+) = (+)
(+)(-) = (-)
(-)(+) = (-)
(-)(-) = (+)

Answer 5

substitution method

-y -4 = -2
+4 = +4
--------------
-y = +2
/
-1 -1
------------
y = -2

you should now be able to solve for x using y = -2

x -2 ( -2 ) = -3
x +4 = -3
-4 = -4
-------------
x = -7

now this is using the substitution method, and not addition subtraction method or determinance method.

Answer 6

from the first expression, -y-4=-2
-y=2
or y=-2
y= -2 in second eqn
ie x-2(-2)= -3
x+4= -3
x= -7
U don't just copy it. That will not help you.
u must understand the problem & try to do similar problems your self

Answer 7

You use elimination.

add 4 to both sides on the first equation.
Now you have:

-y = -2 + 4

Divide both sides by -1
Now you have:

y = 2 - 4

So:

y = -2

Now substitute.

x - 2(-2) = -3

So now it's:

x + 4 = -3

Subtract 4 from both sides.
Now you have:

x = -3 - 4

So:

x = -7

Therefore, the answer is:

x = -7

and

y = -2

Answer 8

y=-2
x=1