84=15y-3y

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Solution for 84=15y-3y equation:


Simplifying
84 = 15y + -3y

Combine like terms: 15y + -3y = 12y
84 = 12y

Solving
84 = 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.
84 + -12y = 12y + -12y

Combine like terms: 12y + -12y = 0
84 + -12y = 0

Add '-84' to each side of the equation.
84 + -84 + -12y = 0 + -84

Combine like terms: 84 + -84 = 0
0 + -12y = 0 + -84
-12y = 0 + -84

Combine like terms: 0 + -84 = -84
-12y = -84

Divide each side by '-12'.
y = 7

Simplifying
y = 7

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