5x+21+3x=20+7x-2

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Solution for 5x+21+3x=20+7x-2 equation:


Simplifying
5x + 21 + 3x = 20 + 7x + -2

Reorder the terms:
21 + 5x + 3x = 20 + 7x + -2

Combine like terms: 5x + 3x = 8x
21 + 8x = 20 + 7x + -2

Reorder the terms:
21 + 8x = 20 + -2 + 7x

Combine like terms: 20 + -2 = 18
21 + 8x = 18 + 7x

Solving
21 + 8x = 18 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
21 + 8x + -7x = 18 + 7x + -7x

Combine like terms: 8x + -7x = 1x
21 + 1x = 18 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + 1x = 18 + 0
21 + 1x = 18

Add '-21' to each side of the equation.
21 + -21 + 1x = 18 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 18 + -21
1x = 18 + -21

Combine like terms: 18 + -21 = -3
1x = -3

Divide each side by '1'.
x = -3

Simplifying
x = -3

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