18=4-(y+7)

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Solution for 18=4-(y+7) equation:


Simplifying
18 = 4 + -1(y + 7)

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

Combine like terms: 4 + -7 = -3
18 = -3 + -1y

Solving
18 = -3 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
18 + y = -3 + -1y + y

Combine like terms: -1y + y = 0
18 + y = -3 + 0
18 + y = -3

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

Combine like terms: 18 + -18 = 0
0 + y = -3 + -18
y = -3 + -18

Combine like terms: -3 + -18 = -21
y = -21

Simplifying
y = -21

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