3(90+-1y)-y=18

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Solution for 3(90+-1y)-y=18 equation:


Simplifying
3(90 + -1y) + -1y = 18
(90 * 3 + -1y * 3) + -1y = 18
(270 + -3y) + -1y = 18

Combine like terms: -3y + -1y = -4y
270 + -4y = 18

Solving
270 + -4y = 18

Solving for variable 'y'.

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

Add '-270' to each side of the equation.
270 + -270 + -4y = 18 + -270

Combine like terms: 270 + -270 = 0
0 + -4y = 18 + -270
-4y = 18 + -270

Combine like terms: 18 + -270 = -252
-4y = -252

Divide each side by '-4'.
y = 63

Simplifying
y = 63

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