40-2y=78

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Solution for 40-2y=78 equation: 


Simplifying
40 + -2y = 78

Solving
40 + -2y = 78

Solving for variable 'y'.

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

Add '-40' to each side of the equation.
40 + -40 + -2y = 78 + -40

Combine like terms: 40 + -40 = 0
0 + -2y = 78 + -40
-2y = 78 + -40

Combine like terms: 78 + -40 = 38
-2y = 38

Divide each side by '-2'.
y = -19

Simplifying
y = -19

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