7(x+8)=21

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Solution for 7(x+8)=21 equation: 


Simplifying
7(x + 8) = 21

Reorder the terms:
7(8 + x) = 21
(8 * 7 + x * 7) = 21
(56 + 7x) = 21

Solving
56 + 7x = 21

Solving for variable 'x'.

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

Add '-56' to each side of the equation.
56 + -56 + 7x = 21 + -56

Combine like terms: 56 + -56 = 0
0 + 7x = 21 + -56
7x = 21 + -56

Combine like terms: 21 + -56 = -35
7x = -35

Divide each side by '7'.
x = -5

Simplifying
x = -5

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