10x-21=9x+10

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


Simplifying
10x + -21 = 9x + 10

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

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

Solving
-21 + 10x = 10 + 9x

Solving for variable 'x'.

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

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

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

Combine like terms: 9x + -9x = 0
-21 + 1x = 10 + 0
-21 + 1x = 10

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

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

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

Divide each side by '1'.
x = 31

Simplifying
x = 31

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