7(3s+7)=280

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Solution for 7(3s+7)=280 equation: 


Simplifying
7(3s + 7) = 280

Reorder the terms:
7(7 + 3s) = 280
(7 * 7 + 3s * 7) = 280
(49 + 21s) = 280

Solving
49 + 21s = 280

Solving for variable 's'.

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

Add '-49' to each side of the equation.
49 + -49 + 21s = 280 + -49

Combine like terms: 49 + -49 = 0
0 + 21s = 280 + -49
21s = 280 + -49

Combine like terms: 280 + -49 = 231
21s = 231

Divide each side by '21'.
s = 11

Simplifying
s = 11

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