S*7+21=217

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Solution for S*7+21=217 equation: 


Simplifying
S * 7 + 21 = 217

Reorder the terms for easier multiplication:
7S + 21 = 217

Reorder the terms:
21 + 7S = 217

Solving
21 + 7S = 217

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 = 217 + -21

Combine like terms: 21 + -21 = 0
0 + 7S = 217 + -21
7S = 217 + -21

Combine like terms: 217 + -21 = 196
7S = 196

Divide each side by '7'.
S = 28

Simplifying
S = 28

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