54+5y-21=15y-9-3y

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Solution for 54+5y-21=15y-9-3y equation:


Simplifying
54 + 5y + -21 = 15y + -9 + -3y

Reorder the terms:
54 + -21 + 5y = 15y + -9 + -3y

Combine like terms: 54 + -21 = 33
33 + 5y = 15y + -9 + -3y

Reorder the terms:
33 + 5y = -9 + 15y + -3y

Combine like terms: 15y + -3y = 12y
33 + 5y = -9 + 12y

Solving
33 + 5y = -9 + 12y

Solving for variable 'y'.

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

Add '-12y' to each side of the equation.
33 + 5y + -12y = -9 + 12y + -12y

Combine like terms: 5y + -12y = -7y
33 + -7y = -9 + 12y + -12y

Combine like terms: 12y + -12y = 0
33 + -7y = -9 + 0
33 + -7y = -9

Add '-33' to each side of the equation.
33 + -33 + -7y = -9 + -33

Combine like terms: 33 + -33 = 0
0 + -7y = -9 + -33
-7y = -9 + -33

Combine like terms: -9 + -33 = -42
-7y = -42

Divide each side by '-7'.
y = 6

Simplifying
y = 6

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