21+4y-1=17y-12-5y

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Solution for 21+4y-1=17y-12-5y equation: 


Simplifying
21 + 4y + -1 = 17y + -12 + -5y

Reorder the terms:
21 + -1 + 4y = 17y + -12 + -5y

Combine like terms: 21 + -1 = 20
20 + 4y = 17y + -12 + -5y

Reorder the terms:
20 + 4y = -12 + 17y + -5y

Combine like terms: 17y + -5y = 12y
20 + 4y = -12 + 12y

Solving
20 + 4y = -12 + 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.
20 + 4y + -12y = -12 + 12y + -12y

Combine like terms: 4y + -12y = -8y
20 + -8y = -12 + 12y + -12y

Combine like terms: 12y + -12y = 0
20 + -8y = -12 + 0
20 + -8y = -12

Add '-20' to each side of the equation.
20 + -20 + -8y = -12 + -20

Combine like terms: 20 + -20 = 0
0 + -8y = -12 + -20
-8y = -12 + -20

Combine like terms: -12 + -20 = -32
-8y = -32

Divide each side by '-8'.
y = 4

Simplifying
y = 4

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