3y+78=15

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Solution for 3y+78=15 equation: 


Simplifying
3y + 78 = 15

Reorder the terms:
78 + 3y = 15

Solving
78 + 3y = 15

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 + 3y = 15 + -78

Combine like terms: 78 + -78 = 0
0 + 3y = 15 + -78
3y = 15 + -78

Combine like terms: 15 + -78 = -63
3y = -63

Divide each side by '3'.
y = -21

Simplifying
y = -21

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