s*7+21=91

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Solution for s*7+21=91 equation:


Simplifying
s * 7 + 21 = 91

Reorder the terms for easier multiplication:
7s + 21 = 91

Reorder the terms:
21 + 7s = 91

Solving
21 + 7s = 91

Solving for variable 's'.

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

Add '-21' to each side of the equation.
21 + -21 + 7s = 91 + -21

Combine like terms: 21 + -21 = 0
0 + 7s = 91 + -21
7s = 91 + -21

Combine like terms: 91 + -21 = 70
7s = 70

Divide each side by '7'.
s = 10

Simplifying
s = 10

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