7(x-10)=21

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Solution for 7(x-10)=21 equation: 


Simplifying
7(x + -10) = 21

Reorder the terms:
7(-10 + x) = 21
(-10 * 7 + x * 7) = 21
(-70 + 7x) = 21

Solving
-70 + 7x = 21

Solving for variable 'x'.

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

Add '70' to each side of the equation.
-70 + 70 + 7x = 21 + 70

Combine like terms: -70 + 70 = 0
0 + 7x = 21 + 70
7x = 21 + 70

Combine like terms: 21 + 70 = 91
7x = 91

Divide each side by '7'.
x = 13

Simplifying
x = 13

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