y+9=2y-72

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Solution for y+9=2y-72 equation:


Simplifying
y + 9 = 2y + -72

Reorder the terms:
9 + y = 2y + -72

Reorder the terms:
9 + y = -72 + 2y

Solving
9 + y = -72 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
9 + y + -2y = -72 + 2y + -2y

Combine like terms: y + -2y = -1y
9 + -1y = -72 + 2y + -2y

Combine like terms: 2y + -2y = 0
9 + -1y = -72 + 0
9 + -1y = -72

Add '-9' to each side of the equation.
9 + -9 + -1y = -72 + -9

Combine like terms: 9 + -9 = 0
0 + -1y = -72 + -9
-1y = -72 + -9

Combine like terms: -72 + -9 = -81
-1y = -81

Divide each side by '-1'.
y = 81

Simplifying
y = 81

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