78-y=189

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Solution for 78-y=189 equation: 


Simplifying
78 + -1y = 189

Solving
78 + -1y = 189

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 = 189 + -78

Combine like terms: 78 + -78 = 0
0 + -1y = 189 + -78
-1y = 189 + -78

Combine like terms: 189 + -78 = 111
-1y = 111

Divide each side by '-1'.
y = -111

Simplifying
y = -111

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