13-3y=y-7

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Solution for 13-3y=y-7 equation: 


Simplifying
13 + -3y = y + -7

Reorder the terms:
13 + -3y = -7 + y

Solving
13 + -3y = -7 + 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.
13 + -3y + -1y = -7 + y + -1y

Combine like terms: -3y + -1y = -4y
13 + -4y = -7 + y + -1y

Combine like terms: y + -1y = 0
13 + -4y = -7 + 0
13 + -4y = -7

Add '-13' to each side of the equation.
13 + -13 + -4y = -7 + -13

Combine like terms: 13 + -13 = 0
0 + -4y = -7 + -13
-4y = -7 + -13

Combine like terms: -7 + -13 = -20
-4y = -20

Divide each side by '-4'.
y = 5

Simplifying
y = 5

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