7(X+6)=21

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Solution for 7(X+6)=21 equation: 


Simplifying
7(X + 6) = 21

Reorder the terms:
7(6 + X) = 21
(6 * 7 + X * 7) = 21
(42 + 7X) = 21

Solving
42 + 7X = 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 + 7X = 21 + -42

Combine like terms: 42 + -42 = 0
0 + 7X = 21 + -42
7X = 21 + -42

Combine like terms: 21 + -42 = -21
7X = -21

Divide each side by '7'.
X = -3

Simplifying
X = -3

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