91=21+10x

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Solution for 91=21+10x equation:


Simplifying
91 = 21 + 10x

Solving
91 = 21 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
91 + -10x = 21 + 10x + -10x

Combine like terms: 10x + -10x = 0
91 + -10x = 21 + 0
91 + -10x = 21

Add '-91' to each side of the equation.
91 + -91 + -10x = 21 + -91

Combine like terms: 91 + -91 = 0
0 + -10x = 21 + -91
-10x = 21 + -91

Combine like terms: 21 + -91 = -70
-10x = -70

Divide each side by '-10'.
x = 7

Simplifying
x = 7

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