Answer:
x=-3
Step-by-step explanation:
2 x - 3 y = -12.
4 x + y = -10.
1. You got that one right ;)
2. 3(x+12)
3. c/3+10
4. 2+6x
5. 2/3x-11
6. 2(c-4)
7. 9x-7
8. 6x+7x
9. x+2x
10. 1/4x+11
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If the shapes are similar, the correspondent sides are in proportion:

Let's plug the values and solve for x:

Multiply both sides by x to get

The only feasible solution, though, is
, because it wouldn't make sense to have negative lengths.