.90*(72+s)=72

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Solution for .90*(72+s)=72 equation: 


Simplifying
0.90(72 + s) = 72
(72 * 0.90 + s * 0.90) = 72
(64.8 + 0.90s) = 72

Solving
64.8 + 0.90s = 72

Solving for variable 's'.

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

Add '-64.8' to each side of the equation.
64.8 + -64.8 + 0.90s = 72 + -64.8

Combine like terms: 64.8 + -64.8 = 0.0
0.0 + 0.90s = 72 + -64.8
0.90s = 72 + -64.8

Combine like terms: 72 + -64.8 = 7.2
0.90s = 7.2

Divide each side by '0.90'.
s = 8

Simplifying
s = 8

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