4(x+21)=x-18

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Solution for 4(x+21)=x-18 equation:


Simplifying
4(x + 21) = x + -18

Reorder the terms:
4(21 + x) = x + -18
(21 * 4 + x * 4) = x + -18
(84 + 4x) = x + -18

Reorder the terms:
84 + 4x = -18 + x

Solving
84 + 4x = -18 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
84 + 4x + -1x = -18 + x + -1x

Combine like terms: 4x + -1x = 3x
84 + 3x = -18 + x + -1x

Combine like terms: x + -1x = 0
84 + 3x = -18 + 0
84 + 3x = -18

Add '-84' to each side of the equation.
84 + -84 + 3x = -18 + -84

Combine like terms: 84 + -84 = 0
0 + 3x = -18 + -84
3x = -18 + -84

Combine like terms: -18 + -84 = -102
3x = -102

Divide each side by '3'.
x = -34

Simplifying
x = -34

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