7y-2(y-4)=9y-(5y+13)

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Solution for 7y-2(y-4)=9y-(5y+13) equation:


Simplifying
7y + -2(y + -4) = 9y + -1(5y + 13)

Reorder the terms:
7y + -2(-4 + y) = 9y + -1(5y + 13)
7y + (-4 * -2 + y * -2) = 9y + -1(5y + 13)
7y + (8 + -2y) = 9y + -1(5y + 13)

Reorder the terms:
8 + 7y + -2y = 9y + -1(5y + 13)

Combine like terms: 7y + -2y = 5y
8 + 5y = 9y + -1(5y + 13)

Reorder the terms:
8 + 5y = 9y + -1(13 + 5y)
8 + 5y = 9y + (13 * -1 + 5y * -1)
8 + 5y = 9y + (-13 + -5y)

Reorder the terms:
8 + 5y = -13 + 9y + -5y

Combine like terms: 9y + -5y = 4y
8 + 5y = -13 + 4y

Solving
8 + 5y = -13 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
8 + 5y + -4y = -13 + 4y + -4y

Combine like terms: 5y + -4y = 1y
8 + 1y = -13 + 4y + -4y

Combine like terms: 4y + -4y = 0
8 + 1y = -13 + 0
8 + 1y = -13

Add '-8' to each side of the equation.
8 + -8 + 1y = -13 + -8

Combine like terms: 8 + -8 = 0
0 + 1y = -13 + -8
1y = -13 + -8

Combine like terms: -13 + -8 = -21
1y = -21

Divide each side by '1'.
y = -21

Simplifying
y = -21

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