21+31=10x-9

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Solution for 21+31=10x-9 equation:


Simplifying
21 + 31 = 10x + -9

Combine like terms: 21 + 31 = 52
52 = 10x + -9

Reorder the terms:
52 = -9 + 10x

Solving
52 = -9 + 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.
52 + -10x = -9 + 10x + -10x

Combine like terms: 10x + -10x = 0
52 + -10x = -9 + 0
52 + -10x = -9

Add '-52' to each side of the equation.
52 + -52 + -10x = -9 + -52

Combine like terms: 52 + -52 = 0
0 + -10x = -9 + -52
-10x = -9 + -52

Combine like terms: -9 + -52 = -61
-10x = -61

Divide each side by '-10'.
x = 6.1

Simplifying
x = 6.1

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