3(x+4)-21x=72

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Solution for 3(x+4)-21x=72 equation:


Simplifying
3(x + 4) + -21x = 72

Reorder the terms:
3(4 + x) + -21x = 72
(4 * 3 + x * 3) + -21x = 72
(12 + 3x) + -21x = 72

Combine like terms: 3x + -21x = -18x
12 + -18x = 72

Solving
12 + -18x = 72

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 + -18x = 72 + -12

Combine like terms: 12 + -12 = 0
0 + -18x = 72 + -12
-18x = 72 + -12

Combine like terms: 72 + -12 = 60
-18x = 60

Divide each side by '-18'.
x = -3.333333333

Simplifying
x = -3.333333333

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