4x+8=x-3x+21

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Solution for 4x+8=x-3x+21 equation:


Simplifying
4x + 8 = x + -3x + 21

Reorder the terms:
8 + 4x = x + -3x + 21

Reorder the terms:
8 + 4x = 21 + x + -3x

Combine like terms: x + -3x = -2x
8 + 4x = 21 + -2x

Solving
8 + 4x = 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.
8 + 4x + 2x = 21 + -2x + 2x

Combine like terms: 4x + 2x = 6x
8 + 6x = 21 + -2x + 2x

Combine like terms: -2x + 2x = 0
8 + 6x = 21 + 0
8 + 6x = 21

Add '-8' to each side of the equation.
8 + -8 + 6x = 21 + -8

Combine like terms: 8 + -8 = 0
0 + 6x = 21 + -8
6x = 21 + -8

Combine like terms: 21 + -8 = 13
6x = 13

Divide each side by '6'.
x = 2.166666667

Simplifying
x = 2.166666667

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