Question

Help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

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Answer 2

9. x=-6, y=0

10. x=-9, y=-10

11. x=3, y=-1

Explanation:

`2x-9y=-12\\3x+18y=-18`

Multiply the first equation by 2.

`4x-18y=-24\\3x+18y=-18`

Add the equations.

`7x=-42`

`x=-6`

We figured out x now we have to figure out y. To figure out y plug in x into any equation.

`2(-6)-9y=-12`

`-12-9y=-12`

`-9y=0`

`y=0`

Your answer is x = -6 and y = 0 for number nine.

`6x+3y=24\\2x+3y=-12`

Change the signs of the second equation becuase 3y and 3y are both positive. We need one of them to be negative.

`6x+3y=24\\-2x-3y=12`

Add them.

`4x = 36`

`x=9`

Now we have to figure out y.

`2(9)+3y=-12`

`18+3y=-12`

`3y=-30`

`y=-10`

x=-9 and y=-10 is your answer to number ten.

`10x+5y=25\\-7x-3y=-18`

`30x+15y=75\\-35x-15y=-90`

`-5x=-15`

`x=3`

`-7(3)-3y=-18`

`-21-3y=-18`

`-3y=3`

`y=-1`

x=3 and y=-1 is the answer to number eleven. I hope this helps! Let me know if I got anything wrong.