3x+7+2x-4=2x-21

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Solution for 3x+7+2x-4=2x-21 equation:


Simplifying
3x + 7 + 2x + -4 = 2x + -21

Reorder the terms:
7 + -4 + 3x + 2x = 2x + -21

Combine like terms: 7 + -4 = 3
3 + 3x + 2x = 2x + -21

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

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

Solving
3 + 5x = -21 + 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.
3 + 5x + -2x = -21 + 2x + -2x

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

Combine like terms: 2x + -2x = 0
3 + 3x = -21 + 0
3 + 3x = -21

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

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

Combine like terms: -21 + -3 = -24
3x = -24

Divide each side by '3'.
x = -8

Simplifying
x = -8

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