51+4y-21=13y-12-12y

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Solution for 51+4y-21=13y-12-12y equation:


Simplifying
51 + 4y + -21 = 13y + -12 + -12y

Reorder the terms:
51 + -21 + 4y = 13y + -12 + -12y

Combine like terms: 51 + -21 = 30
30 + 4y = 13y + -12 + -12y

Reorder the terms:
30 + 4y = -12 + 13y + -12y

Combine like terms: 13y + -12y = 1y
30 + 4y = -12 + 1y

Solving
30 + 4y = -12 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
30 + 4y + -1y = -12 + 1y + -1y

Combine like terms: 4y + -1y = 3y
30 + 3y = -12 + 1y + -1y

Combine like terms: 1y + -1y = 0
30 + 3y = -12 + 0
30 + 3y = -12

Add '-30' to each side of the equation.
30 + -30 + 3y = -12 + -30

Combine like terms: 30 + -30 = 0
0 + 3y = -12 + -30
3y = -12 + -30

Combine like terms: -12 + -30 = -42
3y = -42

Divide each side by '3'.
y = -14

Simplifying
y = -14

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