87=y+15+y

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Solution for 87=y+15+y equation:


Simplifying
87 = y + 15 + y

Reorder the terms:
87 = 15 + y + y

Combine like terms: y + y = 2y
87 = 15 + 2y

Solving
87 = 15 + 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.
87 + -2y = 15 + 2y + -2y

Combine like terms: 2y + -2y = 0
87 + -2y = 15 + 0
87 + -2y = 15

Add '-87' to each side of the equation.
87 + -87 + -2y = 15 + -87

Combine like terms: 87 + -87 = 0
0 + -2y = 15 + -87
-2y = 15 + -87

Combine like terms: 15 + -87 = -72
-2y = -72

Divide each side by '-2'.
y = 36

Simplifying
y = 36

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