7(8-x)=21

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


Simplifying
7(8 + -1x) = 21
(8 * 7 + -1x * 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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