90-y=30

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Solution for 90-y=30 equation: 


Simplifying
90 + -1y = 30

Solving
90 + -1y = 30

Solving for variable 'y'.

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

Add '-90' to each side of the equation.
90 + -90 + -1y = 30 + -90

Combine like terms: 90 + -90 = 0
0 + -1y = 30 + -90
-1y = 30 + -90

Combine like terms: 30 + -90 = -60
-1y = -60

Divide each side by '-1'.
y = 60

Simplifying
y = 60

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