57-18=x-20

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Solution for 57-18=x-20 equation:


Simplifying
57 + -18 = x + -20

Combine like terms: 57 + -18 = 39
39 = x + -20

Reorder the terms:
39 = -20 + x

Solving
39 = -20 + 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.
39 + -1x = -20 + x + -1x

Combine like terms: x + -1x = 0
39 + -1x = -20 + 0
39 + -1x = -20

Add '-39' to each side of the equation.
39 + -39 + -1x = -20 + -39

Combine like terms: 39 + -39 = 0
0 + -1x = -20 + -39
-1x = -20 + -39

Combine like terms: -20 + -39 = -59
-1x = -59

Divide each side by '-1'.
x = 59

Simplifying
x = 59

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