9-10x=81-31x

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Solution for 9-10x=81-31x equation:


Simplifying
9 + -10x = 81 + -31x

Solving
9 + -10x = 81 + -31x

Solving for variable 'x'.

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

Add '31x' to each side of the equation.
9 + -10x + 31x = 81 + -31x + 31x

Combine like terms: -10x + 31x = 21x
9 + 21x = 81 + -31x + 31x

Combine like terms: -31x + 31x = 0
9 + 21x = 81 + 0
9 + 21x = 81

Add '-9' to each side of the equation.
9 + -9 + 21x = 81 + -9

Combine like terms: 9 + -9 = 0
0 + 21x = 81 + -9
21x = 81 + -9

Combine like terms: 81 + -9 = 72
21x = 72

Divide each side by '21'.
x = 3.428571429

Simplifying
x = 3.428571429

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