21+3y-2=12y-11-4y

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Solution for 21+3y-2=12y-11-4y equation:


Simplifying
21 + 3y + -2 = 12y + -11 + -4y

Reorder the terms:
21 + -2 + 3y = 12y + -11 + -4y

Combine like terms: 21 + -2 = 19
19 + 3y = 12y + -11 + -4y

Reorder the terms:
19 + 3y = -11 + 12y + -4y

Combine like terms: 12y + -4y = 8y
19 + 3y = -11 + 8y

Solving
19 + 3y = -11 + 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
19 + 3y + -8y = -11 + 8y + -8y

Combine like terms: 3y + -8y = -5y
19 + -5y = -11 + 8y + -8y

Combine like terms: 8y + -8y = 0
19 + -5y = -11 + 0
19 + -5y = -11

Add '-19' to each side of the equation.
19 + -19 + -5y = -11 + -19

Combine like terms: 19 + -19 = 0
0 + -5y = -11 + -19
-5y = -11 + -19

Combine like terms: -11 + -19 = -30
-5y = -30

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

Simplifying
y = 6

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