-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 = -24x
-12 + -24x = 72

Solving
-12 + -24x = 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 + -24x = 72 + 12

Combine like terms: -12 + 12 = 0
0 + -24x = 72 + 12
-24x = 72 + 12

Combine like terms: 72 + 12 = 84
-24x = 84

Divide each side by '-24'.
x = -3.5

Simplifying
x = -3.5

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