-2y-9=3y+21

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Solution for -2y-9=3y+21 equation:


Simplifying
-2y + -9 = 3y + 21

Reorder the terms:
-9 + -2y = 3y + 21

Reorder the terms:
-9 + -2y = 21 + 3y

Solving
-9 + -2y = 21 + 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.
-9 + -2y + -3y = 21 + 3y + -3y

Combine like terms: -2y + -3y = -5y
-9 + -5y = 21 + 3y + -3y

Combine like terms: 3y + -3y = 0
-9 + -5y = 21 + 0
-9 + -5y = 21

Add '9' to each side of the equation.
-9 + 9 + -5y = 21 + 9

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

Combine like terms: 21 + 9 = 30
-5y = 30

Divide each side by '-5'.
y = -6

Simplifying
y = -6

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