21+4y-8=15y-11-3y

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Solution for 21+4y-8=15y-11-3y equation:


Simplifying
21 + 4y + -8 = 15y + -11 + -3y

Reorder the terms:
21 + -8 + 4y = 15y + -11 + -3y

Combine like terms: 21 + -8 = 13
13 + 4y = 15y + -11 + -3y

Reorder the terms:
13 + 4y = -11 + 15y + -3y

Combine like terms: 15y + -3y = 12y
13 + 4y = -11 + 12y

Solving
13 + 4y = -11 + 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.
13 + 4y + -12y = -11 + 12y + -12y

Combine like terms: 4y + -12y = -8y
13 + -8y = -11 + 12y + -12y

Combine like terms: 12y + -12y = 0
13 + -8y = -11 + 0
13 + -8y = -11

Add '-13' to each side of the equation.
13 + -13 + -8y = -11 + -13

Combine like terms: 13 + -13 = 0
0 + -8y = -11 + -13
-8y = -11 + -13

Combine like terms: -11 + -13 = -24
-8y = -24

Divide each side by '-8'.
y = 3

Simplifying
y = 3

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