2z-31=9z+21

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Solution for 2z-31=9z+21 equation:


Simplifying
2z + -31 = 9z + 21

Reorder the terms:
-31 + 2z = 9z + 21

Reorder the terms:
-31 + 2z = 21 + 9z

Solving
-31 + 2z = 21 + 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.
-31 + 2z + -9z = 21 + 9z + -9z

Combine like terms: 2z + -9z = -7z
-31 + -7z = 21 + 9z + -9z

Combine like terms: 9z + -9z = 0
-31 + -7z = 21 + 0
-31 + -7z = 21

Add '31' to each side of the equation.
-31 + 31 + -7z = 21 + 31

Combine like terms: -31 + 31 = 0
0 + -7z = 21 + 31
-7z = 21 + 31

Combine like terms: 21 + 31 = 52
-7z = 52

Divide each side by '-7'.
z = -7.428571429

Simplifying
z = -7.428571429

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