Solve for the Unknown

Gap-fill exercise

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Type your answers in the box provided.

Solve for x. It will take at least two steps to solve.

13. 9 - 4x = 37
x =

14. 12 - 4x = 108
x =

15. -7x - 24 = -129
x =

16. -6x - 18 = -132
x =