57-7=2x+20

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Solution for 57-7=2x+20 equation:


Simplifying
57 + -7 = 2x + 20

Combine like terms: 57 + -7 = 50
50 = 2x + 20

Reorder the terms:
50 = 20 + 2x

Solving
50 = 20 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
50 + -2x = 20 + 2x + -2x

Combine like terms: 2x + -2x = 0
50 + -2x = 20 + 0
50 + -2x = 20

Add '-50' to each side of the equation.
50 + -50 + -2x = 20 + -50

Combine like terms: 50 + -50 = 0
0 + -2x = 20 + -50
-2x = 20 + -50

Combine like terms: 20 + -50 = -30
-2x = -30

Divide each side by '-2'.
x = 15

Simplifying
x = 15

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