15+6=8y-5y

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Solution for 15+6=8y-5y equation:


Simplifying
15 + 6 = 8y + -5y

Combine like terms: 15 + 6 = 21
21 = 8y + -5y

Combine like terms: 8y + -5y = 3y
21 = 3y

Solving
21 = 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
21 + -3y = 3y + -3y

Combine like terms: 3y + -3y = 0
21 + -3y = 0

Add '-21' to each side of the equation.
21 + -21 + -3y = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -3y = 0 + -21
-3y = 0 + -21

Combine like terms: 0 + -21 = -21
-3y = -21

Divide each side by '-3'.
y = 7

Simplifying
y = 7

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