Y-4y=8+7

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Solution for Y-4y=8+7 equation: 


Simplifying
Y + -4y = 8 + 7

Combine like terms: 8 + 7 = 15
Y + -4y = 15

Solving
Y + -4y = 15

Solving for variable 'Y'.

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

Add '4y' to each side of the equation.
Y + -4y + 4y = 15 + 4y

Combine like terms: -4y + 4y = 0
Y + 0 = 15 + 4y
Y = 15 + 4y

Simplifying
Y = 15 + 4y

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