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

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


Simplifying
7y + 3(7 + -1y) = -1(y + 4)
7y + (7 * 3 + -1y * 3) = -1(y + 4)
7y + (21 + -3y) = -1(y + 4)

Reorder the terms:
21 + 7y + -3y = -1(y + 4)

Combine like terms: 7y + -3y = 4y
21 + 4y = -1(y + 4)

Reorder the terms:
21 + 4y = -1(4 + y)
21 + 4y = (4 * -1 + y * -1)
21 + 4y = (-4 + -1y)

Solving
21 + 4y = -4 + -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.
21 + 4y + y = -4 + -1y + y

Combine like terms: 4y + y = 5y
21 + 5y = -4 + -1y + y

Combine like terms: -1y + y = 0
21 + 5y = -4 + 0
21 + 5y = -4

Add '-21' to each side of the equation.
21 + -21 + 5y = -4 + -21

Combine like terms: 21 + -21 = 0
0 + 5y = -4 + -21
5y = -4 + -21

Combine like terms: -4 + -21 = -25
5y = -25

Divide each side by '5'.
y = -5

Simplifying
y = -5

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