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

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


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

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

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

Combine like terms: -5 + 36 = 31
-7 = 31 + -49 + -4y + -21y

Combine like terms: 31 + -49 = -18
-7 = -18 + -4y + -21y

Combine like terms: -4y + -21y = -25y
-7 = -18 + -25y

Solving
-7 = -18 + -25y

Solving for variable 'y'.

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

Add '25y' to each side of the equation.
-7 + 25y = -18 + -25y + 25y

Combine like terms: -25y + 25y = 0
-7 + 25y = -18 + 0
-7 + 25y = -18

Add '7' to each side of the equation.
-7 + 7 + 25y = -18 + 7

Combine like terms: -7 + 7 = 0
0 + 25y = -18 + 7
25y = -18 + 7

Combine like terms: -18 + 7 = -11
25y = -11

Divide each side by '25'.
y = -0.44

Simplifying
y = -0.44

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