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

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


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

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

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

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

Combine like terms: 17y + -4y = 13y
20 + 5y = -12 + 13y

Solving
20 + 5y = -12 + 13y

Solving for variable 'y'.

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

Add '-13y' to each side of the equation.
20 + 5y + -13y = -12 + 13y + -13y

Combine like terms: 5y + -13y = -8y
20 + -8y = -12 + 13y + -13y

Combine like terms: 13y + -13y = 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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