84-4y=39-y

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Solution for 84-4y=39-y equation:


Simplifying
84 + -4y = 39 + -1y

Solving
84 + -4y = 39 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
84 + -4y + y = 39 + -1y + y

Combine like terms: -4y + y = -3y
84 + -3y = 39 + -1y + y

Combine like terms: -1y + y = 0
84 + -3y = 39 + 0
84 + -3y = 39

Add '-84' to each side of the equation.
84 + -84 + -3y = 39 + -84

Combine like terms: 84 + -84 = 0
0 + -3y = 39 + -84
-3y = 39 + -84

Combine like terms: 39 + -84 = -45
-3y = -45

Divide each side by '-3'.
y = 15

Simplifying
y = 15

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