7z-20=9z

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Solution for 7z-20=9z equation:


Simplifying
7z + -20 = 9z

Reorder the terms:
-20 + 7z = 9z

Solving
-20 + 7z = 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.
-20 + 7z + -9z = 9z + -9z

Combine like terms: 7z + -9z = -2z
-20 + -2z = 9z + -9z

Combine like terms: 9z + -9z = 0
-20 + -2z = 0

Add '20' to each side of the equation.
-20 + 20 + -2z = 0 + 20

Combine like terms: -20 + 20 = 0
0 + -2z = 0 + 20
-2z = 0 + 20

Combine like terms: 0 + 20 = 20
-2z = 20

Divide each side by '-2'.
z = -10

Simplifying
z = -10

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