9y-7y-12=13.78

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Solution for 9y-7y-12=13.78 equation:


Simplifying
9y + -7y + -12 = 13.78

Reorder the terms:
-12 + 9y + -7y = 13.78

Combine like terms: 9y + -7y = 2y
-12 + 2y = 13.78

Solving
-12 + 2y = 13.78

Solving for variable 'y'.

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

Add '12' to each side of the equation.
-12 + 12 + 2y = 13.78 + 12

Combine like terms: -12 + 12 = 0
0 + 2y = 13.78 + 12
2y = 13.78 + 12

Combine like terms: 13.78 + 12 = 25.78
2y = 25.78

Divide each side by '2'.
y = 12.89

Simplifying
y = 12.89

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