8z-7=9z

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Solution for 8z-7=9z equation:


Simplifying
8z + -7 = 9z

Reorder the terms:
-7 + 8z = 9z

Solving
-7 + 8z = 9z

Solving for variable 'z'.

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

Add '-9z' to each side of the equation.
-7 + 8z + -9z = 9z + -9z

Combine like terms: 8z + -9z = -1z
-7 + -1z = 9z + -9z

Combine like terms: 9z + -9z = 0
-7 + -1z = 0

Add '7' to each side of the equation.
-7 + 7 + -1z = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1z = 0 + 7
-1z = 0 + 7

Combine like terms: 0 + 7 = 7
-1z = 7

Divide each side by '-1'.
z = -7

Simplifying
z = -7

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