9x+10=10x-21

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


Simplifying
9x + 10 = 10x + -21

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

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

Solving
10 + 9x = -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.
10 + 9x + -10x = -21 + 10x + -10x

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

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

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

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

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

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

Simplifying
x = 31

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