3y-15=5y-7

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Solution for 3y-15=5y-7 equation:


Simplifying
3y + -15 = 5y + -7

Reorder the terms:
-15 + 3y = 5y + -7

Reorder the terms:
-15 + 3y = -7 + 5y

Solving
-15 + 3y = -7 + 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.
-15 + 3y + -5y = -7 + 5y + -5y

Combine like terms: 3y + -5y = -2y
-15 + -2y = -7 + 5y + -5y

Combine like terms: 5y + -5y = 0
-15 + -2y = -7 + 0
-15 + -2y = -7

Add '15' to each side of the equation.
-15 + 15 + -2y = -7 + 15

Combine like terms: -15 + 15 = 0
0 + -2y = -7 + 15
-2y = -7 + 15

Combine like terms: -7 + 15 = 8
-2y = 8

Divide each side by '-2'.
y = -4

Simplifying
y = -4

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