7(x-7)=21

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


Simplifying
7(x + -7) = 21

Reorder the terms:
7(-7 + x) = 21
(-7 * 7 + x * 7) = 21
(-49 + 7x) = 21

Solving
-49 + 7x = 21

Solving for variable 'x'.

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

Add '49' to each side of the equation.
-49 + 49 + 7x = 21 + 49

Combine like terms: -49 + 49 = 0
0 + 7x = 21 + 49
7x = 21 + 49

Combine like terms: 21 + 49 = 70
7x = 70

Divide each side by '7'.
x = 10

Simplifying
x = 10

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