-y-13=3y+15

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Solution for -y-13=3y+15 equation:


Simplifying
-1y + -13 = 3y + 15

Reorder the terms:
-13 + -1y = 3y + 15

Reorder the terms:
-13 + -1y = 15 + 3y

Solving
-13 + -1y = 15 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
-13 + -1y + -3y = 15 + 3y + -3y

Combine like terms: -1y + -3y = -4y
-13 + -4y = 15 + 3y + -3y

Combine like terms: 3y + -3y = 0
-13 + -4y = 15 + 0
-13 + -4y = 15

Add '13' to each side of the equation.
-13 + 13 + -4y = 15 + 13

Combine like terms: -13 + 13 = 0
0 + -4y = 15 + 13
-4y = 15 + 13

Combine like terms: 15 + 13 = 28
-4y = 28

Divide each side by '-4'.
y = -7

Simplifying
y = -7

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