-5x+21+3x=7x-2x

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Solution for -5x+21+3x=7x-2x equation:


Simplifying
-5x + 21 + 3x = 7x + -2x

Reorder the terms:
21 + -5x + 3x = 7x + -2x

Combine like terms: -5x + 3x = -2x
21 + -2x = 7x + -2x

Combine like terms: 7x + -2x = 5x
21 + -2x = 5x

Solving
21 + -2x = 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
21 + -2x + -5x = 5x + -5x

Combine like terms: -2x + -5x = -7x
21 + -7x = 5x + -5x

Combine like terms: 5x + -5x = 0
21 + -7x = 0

Add '-21' to each side of the equation.
21 + -21 + -7x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -7x = 0 + -21
-7x = 0 + -21

Combine like terms: 0 + -21 = -21
-7x = -21

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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