3x+15=x+57

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Solution for 3x+15=x+57 equation:


Simplifying
3x + 15 = x + 57

Reorder the terms:
15 + 3x = x + 57

Reorder the terms:
15 + 3x = 57 + x

Solving
15 + 3x = 57 + 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.
15 + 3x + -1x = 57 + x + -1x

Combine like terms: 3x + -1x = 2x
15 + 2x = 57 + x + -1x

Combine like terms: x + -1x = 0
15 + 2x = 57 + 0
15 + 2x = 57

Add '-15' to each side of the equation.
15 + -15 + 2x = 57 + -15

Combine like terms: 15 + -15 = 0
0 + 2x = 57 + -15
2x = 57 + -15

Combine like terms: 57 + -15 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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