-4+y+13=5y+21

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Solution for -4+y+13=5y+21 equation: 


Simplifying
-4 + y + 13 = 5y + 21

Reorder the terms:
-4 + 13 + y = 5y + 21

Combine like terms: -4 + 13 = 9
9 + y = 5y + 21

Reorder the terms:
9 + y = 21 + 5y

Solving
9 + y = 21 + 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.
9 + y + -5y = 21 + 5y + -5y

Combine like terms: y + -5y = -4y
9 + -4y = 21 + 5y + -5y

Combine like terms: 5y + -5y = 0
9 + -4y = 21 + 0
9 + -4y = 21

Add '-9' to each side of the equation.
9 + -9 + -4y = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -4y = 21 + -9
-4y = 21 + -9

Combine like terms: 21 + -9 = 12
-4y = 12

Divide each side by '-4'.
y = -3

Simplifying
y = -3

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