7x+57=3x+21

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Solution for 7x+57=3x+21 equation:


Simplifying
7x + 57 = 3x + 21

Reorder the terms:
57 + 7x = 3x + 21

Reorder the terms:
57 + 7x = 21 + 3x

Solving
57 + 7x = 21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
57 + 7x + -3x = 21 + 3x + -3x

Combine like terms: 7x + -3x = 4x
57 + 4x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
57 + 4x = 21 + 0
57 + 4x = 21

Add '-57' to each side of the equation.
57 + -57 + 4x = 21 + -57

Combine like terms: 57 + -57 = 0
0 + 4x = 21 + -57
4x = 21 + -57

Combine like terms: 21 + -57 = -36
4x = -36

Divide each side by '4'.
x = -9

Simplifying
x = -9

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