3(20-S)+8S=100

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Solution for 3(20-S)+8S=100 equation:


Simplifying
3(20 + -1S) + 8S = 100
(20 * 3 + -1S * 3) + 8S = 100
(60 + -3S) + 8S = 100

Combine like terms: -3S + 8S = 5S
60 + 5S = 100

Solving
60 + 5S = 100

Solving for variable 'S'.

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

Add '-60' to each side of the equation.
60 + -60 + 5S = 100 + -60

Combine like terms: 60 + -60 = 0
0 + 5S = 100 + -60
5S = 100 + -60

Combine like terms: 100 + -60 = 40
5S = 40

Divide each side by '5'.
S = 8

Simplifying
S = 8

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