-8[(9y+7)-(7y-2)]=9(6-y)-4

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Solution for -8[(9y+7)-(7y-2)]=9(6-y)-4 equation:


Simplifying
-8[(9y + 7) + -1(7y + -2)] = 9(6 + -1y) + -4

Reorder the terms:
-8[(7 + 9y) + -1(7y + -2)] = 9(6 + -1y) + -4

Remove parenthesis around (7 + 9y)
-8[7 + 9y + -1(7y + -2)] = 9(6 + -1y) + -4

Reorder the terms:
-8[7 + 9y + -1(-2 + 7y)] = 9(6 + -1y) + -4
-8[7 + 9y + (-2 * -1 + 7y * -1)] = 9(6 + -1y) + -4
-8[7 + 9y + (2 + -7y)] = 9(6 + -1y) + -4

Reorder the terms:
-8[7 + 2 + 9y + -7y] = 9(6 + -1y) + -4

Combine like terms: 7 + 2 = 9
-8[9 + 9y + -7y] = 9(6 + -1y) + -4

Combine like terms: 9y + -7y = 2y
-8[9 + 2y] = 9(6 + -1y) + -4
[9 * -8 + 2y * -8] = 9(6 + -1y) + -4
[-72 + -16y] = 9(6 + -1y) + -4
-72 + -16y = (6 * 9 + -1y * 9) + -4
-72 + -16y = (54 + -9y) + -4

Reorder the terms:
-72 + -16y = 54 + -4 + -9y

Combine like terms: 54 + -4 = 50
-72 + -16y = 50 + -9y

Solving
-72 + -16y = 50 + -9y

Solving for variable 'y'.

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

Add '9y' to each side of the equation.
-72 + -16y + 9y = 50 + -9y + 9y

Combine like terms: -16y + 9y = -7y
-72 + -7y = 50 + -9y + 9y

Combine like terms: -9y + 9y = 0
-72 + -7y = 50 + 0
-72 + -7y = 50

Add '72' to each side of the equation.
-72 + 72 + -7y = 50 + 72

Combine like terms: -72 + 72 = 0
0 + -7y = 50 + 72
-7y = 50 + 72

Combine like terms: 50 + 72 = 122
-7y = 122

Divide each side by '-7'.
y = -17.42857143

Simplifying
y = -17.42857143

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