3(4x+5)=-21

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Solution for 3(4x+5)=-21 equation:


Simplifying
3(4x + 5) = -21

Reorder the terms:
3(5 + 4x) = -21
(5 * 3 + 4x * 3) = -21
(15 + 12x) = -21

Solving
15 + 12x = -21

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 12x = -21 + -15

Combine like terms: 15 + -15 = 0
0 + 12x = -21 + -15
12x = -21 + -15

Combine like terms: -21 + -15 = -36
12x = -36

Divide each side by '12'.
x = -3

Simplifying
x = -3

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