-7=-5y-4(-y+9)-7(7+3y)

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Solution for -7=-5y-4(-y+9)-7(7+3y) equation:


Simplifying
-7 = -5y + -4(-1y + 9) + -7(7 + 3y)

Reorder the terms:
-7 = -5y + -4(9 + -1y) + -7(7 + 3y)
-7 = -5y + (9 * -4 + -1y * -4) + -7(7 + 3y)
-7 = -5y + (-36 + 4y) + -7(7 + 3y)
-7 = -5y + -36 + 4y + (7 * -7 + 3y * -7)
-7 = -5y + -36 + 4y + (-49 + -21y)

Reorder the terms:
-7 = -36 + -49 + -5y + 4y + -21y

Combine like terms: -36 + -49 = -85
-7 = -85 + -5y + 4y + -21y

Combine like terms: -5y + 4y = -1y
-7 = -85 + -1y + -21y

Combine like terms: -1y + -21y = -22y
-7 = -85 + -22y

Solving
-7 = -85 + -22y

Solving for variable 'y'.

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

Add '22y' to each side of the equation.
-7 + 22y = -85 + -22y + 22y

Combine like terms: -22y + 22y = 0
-7 + 22y = -85 + 0
-7 + 22y = -85

Add '7' to each side of the equation.
-7 + 7 + 22y = -85 + 7

Combine like terms: -7 + 7 = 0
0 + 22y = -85 + 7
22y = -85 + 7

Combine like terms: -85 + 7 = -78
22y = -78

Divide each side by '22'.
y = -3.545454545

Simplifying
y = -3.545454545

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