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

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


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

Reorder the terms:
7y + -2(-9 + -1y) = -8(-4y + -7)
7y + (-9 * -2 + -1y * -2) = -8(-4y + -7)
7y + (18 + 2y) = -8(-4y + -7)

Reorder the terms:
18 + 7y + 2y = -8(-4y + -7)

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

Reorder the terms:
18 + 9y = -8(-7 + -4y)
18 + 9y = (-7 * -8 + -4y * -8)
18 + 9y = (56 + 32y)

Solving
18 + 9y = 56 + 32y

Solving for variable 'y'.

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

Add '-32y' to each side of the equation.
18 + 9y + -32y = 56 + 32y + -32y

Combine like terms: 9y + -32y = -23y
18 + -23y = 56 + 32y + -32y

Combine like terms: 32y + -32y = 0
18 + -23y = 56 + 0
18 + -23y = 56

Add '-18' to each side of the equation.
18 + -18 + -23y = 56 + -18

Combine like terms: 18 + -18 = 0
0 + -23y = 56 + -18
-23y = 56 + -18

Combine like terms: 56 + -18 = 38
-23y = 38

Divide each side by '-23'.
y = -1.652173913

Simplifying
y = -1.652173913

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