100=30+0.8y

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Solution for 100=30+0.8y equation:


Simplifying
100 = 30 + 0.8y

Solving
100 = 30 + 0.8y

Solving for variable 'y'.

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

Add '-0.8y' to each side of the equation.
100 + -0.8y = 30 + 0.8y + -0.8y

Combine like terms: 0.8y + -0.8y = 0.0
100 + -0.8y = 30 + 0.0
100 + -0.8y = 30

Add '-100' to each side of the equation.
100 + -100 + -0.8y = 30 + -100

Combine like terms: 100 + -100 = 0
0 + -0.8y = 30 + -100
-0.8y = 30 + -100

Combine like terms: 30 + -100 = -70
-0.8y = -70

Divide each side by '-0.8'.
y = 87.5

Simplifying
y = 87.5

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