4z-7=-15

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Solution for 4z-7=-15 equation: 


Simplifying
4z + -7 = -15

Reorder the terms:
-7 + 4z = -15

Solving
-7 + 4z = -15

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 4z = -15 + 7

Combine like terms: -7 + 7 = 0
0 + 4z = -15 + 7
4z = -15 + 7

Combine like terms: -15 + 7 = -8
4z = -8

Divide each side by '4'.
z = -2

Simplifying
z = -2

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