39-y=78-2y

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Solution for 39-y=78-2y equation:


Simplifying
39 + -1y = 78 + -2y

Solving
39 + -1y = 78 + -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
39 + -1y + 2y = 78 + -2y + 2y

Combine like terms: -1y + 2y = 1y
39 + 1y = 78 + -2y + 2y

Combine like terms: -2y + 2y = 0
39 + 1y = 78 + 0
39 + 1y = 78

Add '-39' to each side of the equation.
39 + -39 + 1y = 78 + -39

Combine like terms: 39 + -39 = 0
0 + 1y = 78 + -39
1y = 78 + -39

Combine like terms: 78 + -39 = 39
1y = 39

Divide each side by '1'.
y = 39

Simplifying
y = 39

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