3y-21=-45+9y

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Solution for 3y-21=-45+9y equation:


Simplifying
3y + -21 = -45 + 9y

Reorder the terms:
-21 + 3y = -45 + 9y

Solving
-21 + 3y = -45 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
-21 + 3y + -9y = -45 + 9y + -9y

Combine like terms: 3y + -9y = -6y
-21 + -6y = -45 + 9y + -9y

Combine like terms: 9y + -9y = 0
-21 + -6y = -45 + 0
-21 + -6y = -45

Add '21' to each side of the equation.
-21 + 21 + -6y = -45 + 21

Combine like terms: -21 + 21 = 0
0 + -6y = -45 + 21
-6y = -45 + 21

Combine like terms: -45 + 21 = -24
-6y = -24

Divide each side by '-6'.
y = 4

Simplifying
y = 4

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