12.9=x-7.1

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Solution for 12.9=x-7.1 equation: 


Simplifying
12.9 = x + -7.1

Reorder the terms:
12.9 = -7.1 + x

Solving
12.9 = -7.1 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
12.9 + -1x = -7.1 + x + -1x

Combine like terms: x + -1x = 0
12.9 + -1x = -7.1 + 0
12.9 + -1x = -7.1

Add '-12.9' to each side of the equation.
12.9 + -12.9 + -1x = -7.1 + -12.9

Combine like terms: 12.9 + -12.9 = 0.0
0.0 + -1x = -7.1 + -12.9
-1x = -7.1 + -12.9

Combine like terms: -7.1 + -12.9 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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