-3(-y-5)-7(3y-7)=2y+9-5y

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Solution for -3(-y-5)-7(3y-7)=2y+9-5y equation:


Simplifying
-3(-1y + -5) + -7(3y + -7) = 2y + 9 + -5y

Reorder the terms:
-3(-5 + -1y) + -7(3y + -7) = 2y + 9 + -5y
(-5 * -3 + -1y * -3) + -7(3y + -7) = 2y + 9 + -5y
(15 + 3y) + -7(3y + -7) = 2y + 9 + -5y

Reorder the terms:
15 + 3y + -7(-7 + 3y) = 2y + 9 + -5y
15 + 3y + (-7 * -7 + 3y * -7) = 2y + 9 + -5y
15 + 3y + (49 + -21y) = 2y + 9 + -5y

Reorder the terms:
15 + 49 + 3y + -21y = 2y + 9 + -5y

Combine like terms: 15 + 49 = 64
64 + 3y + -21y = 2y + 9 + -5y

Combine like terms: 3y + -21y = -18y
64 + -18y = 2y + 9 + -5y

Reorder the terms:
64 + -18y = 9 + 2y + -5y

Combine like terms: 2y + -5y = -3y
64 + -18y = 9 + -3y

Solving
64 + -18y = 9 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
64 + -18y + 3y = 9 + -3y + 3y

Combine like terms: -18y + 3y = -15y
64 + -15y = 9 + -3y + 3y

Combine like terms: -3y + 3y = 0
64 + -15y = 9 + 0
64 + -15y = 9

Add '-64' to each side of the equation.
64 + -64 + -15y = 9 + -64

Combine like terms: 64 + -64 = 0
0 + -15y = 9 + -64
-15y = 9 + -64

Combine like terms: 9 + -64 = -55
-15y = -55

Divide each side by '-15'.
y = 3.666666667

Simplifying
y = 3.666666667

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