5-13=3y-15+4y

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Solution for 5-13=3y-15+4y equation:


Simplifying
5 + -13 = 3y + -15 + 4y

Combine like terms: 5 + -13 = -8
-8 = 3y + -15 + 4y

Reorder the terms:
-8 = -15 + 3y + 4y

Combine like terms: 3y + 4y = 7y
-8 = -15 + 7y

Solving
-8 = -15 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
-8 + -7y = -15 + 7y + -7y

Combine like terms: 7y + -7y = 0
-8 + -7y = -15 + 0
-8 + -7y = -15

Add '8' to each side of the equation.
-8 + 8 + -7y = -15 + 8

Combine like terms: -8 + 8 = 0
0 + -7y = -15 + 8
-7y = -15 + 8

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

Divide each side by '-7'.
y = 1

Simplifying
y = 1

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