9z+10=10z-21

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Solution for 9z+10=10z-21 equation:


Simplifying
9z + 10 = 10z + -21

Reorder the terms:
10 + 9z = 10z + -21

Reorder the terms:
10 + 9z = -21 + 10z

Solving
10 + 9z = -21 + 10z

Solving for variable 'z'.

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

Add '-10z' to each side of the equation.
10 + 9z + -10z = -21 + 10z + -10z

Combine like terms: 9z + -10z = -1z
10 + -1z = -21 + 10z + -10z

Combine like terms: 10z + -10z = 0
10 + -1z = -21 + 0
10 + -1z = -21

Add '-10' to each side of the equation.
10 + -10 + -1z = -21 + -10

Combine like terms: 10 + -10 = 0
0 + -1z = -21 + -10
-1z = -21 + -10

Combine like terms: -21 + -10 = -31
-1z = -31

Divide each side by '-1'.
z = 31

Simplifying
z = 31

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