4(x+3)-3x=21

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Solution for 4(x+3)-3x=21 equation:


Simplifying
4(x + 3) + -3x = 21

Reorder the terms:
4(3 + x) + -3x = 21
(3 * 4 + x * 4) + -3x = 21
(12 + 4x) + -3x = 21

Combine like terms: 4x + -3x = 1x
12 + 1x = 21

Solving
12 + 1x = 21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 1x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + 1x = 21 + -12
1x = 21 + -12

Combine like terms: 21 + -12 = 9
1x = 9

Divide each side by '1'.
x = 9

Simplifying
x = 9

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