9z+13=7z-15

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Solution for 9z+13=7z-15 equation:


Simplifying
9z + 13 = 7z + -15

Reorder the terms:
13 + 9z = 7z + -15

Reorder the terms:
13 + 9z = -15 + 7z

Solving
13 + 9z = -15 + 7z

Solving for variable 'z'.

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

Add '-7z' to each side of the equation.
13 + 9z + -7z = -15 + 7z + -7z

Combine like terms: 9z + -7z = 2z
13 + 2z = -15 + 7z + -7z

Combine like terms: 7z + -7z = 0
13 + 2z = -15 + 0
13 + 2z = -15

Add '-13' to each side of the equation.
13 + -13 + 2z = -15 + -13

Combine like terms: 13 + -13 = 0
0 + 2z = -15 + -13
2z = -15 + -13

Combine like terms: -15 + -13 = -28
2z = -28

Divide each side by '2'.
z = -14

Simplifying
z = -14

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