3y-15=y+15

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Solution for 3y-15=y+15 equation:


Simplifying
3y + -15 = y + 15

Reorder the terms:
-15 + 3y = y + 15

Reorder the terms:
-15 + 3y = 15 + y

Solving
-15 + 3y = 15 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-15 + 3y + -1y = 15 + y + -1y

Combine like terms: 3y + -1y = 2y
-15 + 2y = 15 + y + -1y

Combine like terms: y + -1y = 0
-15 + 2y = 15 + 0
-15 + 2y = 15

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

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

Combine like terms: 15 + 15 = 30
2y = 30

Divide each side by '2'.
y = 15

Simplifying
y = 15

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