-4+y+9=5y+21

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Solution for -4+y+9=5y+21 equation:


Simplifying
-4 + y + 9 = 5y + 21

Reorder the terms:
-4 + 9 + y = 5y + 21

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

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

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

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

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

Add '-5' to each side of the equation.
5 + -5 + -4y = 21 + -5

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

Combine like terms: 21 + -5 = 16
-4y = 16

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

Simplifying
y = -4

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