4(6+x)-x=21

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Solution for 4(6+x)-x=21 equation: 


Simplifying
4(6 + x) + -1x = 21
(6 * 4 + x * 4) + -1x = 21
(24 + 4x) + -1x = 21

Combine like terms: 4x + -1x = 3x
24 + 3x = 21

Solving
24 + 3x = 21

Solving for variable 'x'.

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

Add '-24' to each side of the equation.
24 + -24 + 3x = 21 + -24

Combine like terms: 24 + -24 = 0
0 + 3x = 21 + -24
3x = 21 + -24

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

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

Simplifying
x = -1

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