3(90-y)=30+5y

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Solution for 3(90-y)=30+5y equation:


Simplifying
3(90 + -1y) = 30 + 5y
(90 * 3 + -1y * 3) = 30 + 5y
(270 + -3y) = 30 + 5y

Solving
270 + -3y = 30 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
270 + -3y + -5y = 30 + 5y + -5y

Combine like terms: -3y + -5y = -8y
270 + -8y = 30 + 5y + -5y

Combine like terms: 5y + -5y = 0
270 + -8y = 30 + 0
270 + -8y = 30

Add '-270' to each side of the equation.
270 + -270 + -8y = 30 + -270

Combine like terms: 270 + -270 = 0
0 + -8y = 30 + -270
-8y = 30 + -270

Combine like terms: 30 + -270 = -240
-8y = -240

Divide each side by '-8'.
y = 30

Simplifying
y = 30

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