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Solve this showing work. worth 50 points

Solve this showing work. worth 50 points-example-1

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Answer:

10. X=3

11. FG=15

12. QS=34

Hope this helps

Explanation:

10. 8x+11=12x-1

8x-12x=-1-11

-4x=-12

x=3

11. 11x-7=3x+9

11x-7=-9+7

8x=16

x=2

Substitute the (x)

11(2)-7 =15

12. 5x-3=21-x

5x+x=21+3

6x=24

x=4

Substitute the (x)a

5(4)-3=17

21-(4)=17

17+17=34

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