(9+4y)-(-1+8y)+(7-y)=

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Solution for (9+4y)-(-1+8y)+(7-y)= equation: 


Simplifying
(9 + 4y) + -1(-1 + 8y) + (7 + -1y) = 0

Remove parenthesis around (9 + 4y)
9 + 4y + -1(-1 + 8y) + (7 + -1y) = 0
9 + 4y + (-1 * -1 + 8y * -1) + (7 + -1y) = 0
9 + 4y + (1 + -8y) + (7 + -1y) = 0

Remove parenthesis around (7 + -1y)
9 + 4y + 1 + -8y + 7 + -1y = 0

Reorder the terms:
9 + 1 + 7 + 4y + -8y + -1y = 0

Combine like terms: 9 + 1 = 10
10 + 7 + 4y + -8y + -1y = 0

Combine like terms: 10 + 7 = 17
17 + 4y + -8y + -1y = 0

Combine like terms: 4y + -8y = -4y
17 + -4y + -1y = 0

Combine like terms: -4y + -1y = -5y
17 + -5y = 0

Solving
17 + -5y = 0

Solving for variable 'y'.

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

Add '-17' to each side of the equation.
17 + -17 + -5y = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -5y = 0 + -17
-5y = 0 + -17

Combine like terms: 0 + -17 = -17
-5y = -17

Divide each side by '-5'.
y = 3.4

Simplifying
y = 3.4

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