78-y=7

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Solution for 78-y=7 equation: 


Simplifying
78 + -1y = 7

Solving
78 + -1y = 7

Solving for variable 'y'.

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

Add '-78' to each side of the equation.
78 + -78 + -1y = 7 + -78

Combine like terms: 78 + -78 = 0
0 + -1y = 7 + -78
-1y = 7 + -78

Combine like terms: 7 + -78 = -71
-1y = -71

Divide each side by '-1'.
y = 71

Simplifying
y = 71

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