-7(3x+6)=21

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Solution for -7(3x+6)=21 equation:


Simplifying
-7(3x + 6) = 21

Reorder the terms:
-7(6 + 3x) = 21
(6 * -7 + 3x * -7) = 21
(-42 + -21x) = 21

Solving
-42 + -21x = 21

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + -21x = 21 + 42

Combine like terms: -42 + 42 = 0
0 + -21x = 21 + 42
-21x = 21 + 42

Combine like terms: 21 + 42 = 63
-21x = 63

Divide each side by '-21'.
x = -3

Simplifying
x = -3

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