9(y+9)-(-7y-4)=15y

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Solution for 9(y+9)-(-7y-4)=15y equation:


Simplifying
9(y + 9) + -1(-7y + -4) = 15y

Reorder the terms:
9(9 + y) + -1(-7y + -4) = 15y
(9 * 9 + y * 9) + -1(-7y + -4) = 15y
(81 + 9y) + -1(-7y + -4) = 15y

Reorder the terms:
81 + 9y + -1(-4 + -7y) = 15y
81 + 9y + (-4 * -1 + -7y * -1) = 15y
81 + 9y + (4 + 7y) = 15y

Reorder the terms:
81 + 4 + 9y + 7y = 15y

Combine like terms: 81 + 4 = 85
85 + 9y + 7y = 15y

Combine like terms: 9y + 7y = 16y
85 + 16y = 15y

Solving
85 + 16y = 15y

Solving for variable 'y'.

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

Add '-15y' to each side of the equation.
85 + 16y + -15y = 15y + -15y

Combine like terms: 16y + -15y = 1y
85 + 1y = 15y + -15y

Combine like terms: 15y + -15y = 0
85 + 1y = 0

Add '-85' to each side of the equation.
85 + -85 + 1y = 0 + -85

Combine like terms: 85 + -85 = 0
0 + 1y = 0 + -85
1y = 0 + -85

Combine like terms: 0 + -85 = -85
1y = -85

Divide each side by '1'.
y = -85

Simplifying
y = -85

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