-(7+y)=9-(3y-4)

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Solution for -(7+y)=9-(3y-4) equation:


Simplifying
-1(7 + y) = 9 + -1(3y + -4)
(7 * -1 + y * -1) = 9 + -1(3y + -4)
(-7 + -1y) = 9 + -1(3y + -4)

Reorder the terms:
-7 + -1y = 9 + -1(-4 + 3y)
-7 + -1y = 9 + (-4 * -1 + 3y * -1)
-7 + -1y = 9 + (4 + -3y)

Combine like terms: 9 + 4 = 13
-7 + -1y = 13 + -3y

Solving
-7 + -1y = 13 + -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.
-7 + -1y + 3y = 13 + -3y + 3y

Combine like terms: -1y + 3y = 2y
-7 + 2y = 13 + -3y + 3y

Combine like terms: -3y + 3y = 0
-7 + 2y = 13 + 0
-7 + 2y = 13

Add '7' to each side of the equation.
-7 + 7 + 2y = 13 + 7

Combine like terms: -7 + 7 = 0
0 + 2y = 13 + 7
2y = 13 + 7

Combine like terms: 13 + 7 = 20
2y = 20

Divide each side by '2'.
y = 10

Simplifying
y = 10

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