=4-9(7-(2y-8))

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Solution for =4-9(7-(2y-8)) equation: 


Simplifying
0 = 4 + -9(7 + -1(2y + -8))

Reorder the terms:
0 = 4 + -9(7 + -1(-8 + 2y))
0 = 4 + -9(7 + (-8 * -1 + 2y * -1))
0 = 4 + -9(7 + (8 + -2y))

Combine like terms: 7 + 8 = 15
0 = 4 + -9(15 + -2y)
0 = 4 + (15 * -9 + -2y * -9)
0 = 4 + (-135 + 18y)

Combine like terms: 4 + -135 = -131
0 = -131 + 18y

Solving
0 = -131 + 18y

Solving for variable 'y'.

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

Add '-18y' to each side of the equation.
0 + -18y = -131 + 18y + -18y
Remove the zero:
-18y = -131 + 18y + -18y

Combine like terms: 18y + -18y = 0
-18y = -131 + 0
-18y = -131

Divide each side by '-18'.
y = 7.277777778

Simplifying
y = 7.277777778

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