-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 = -13
-7 = -13 + 5y + -4y + -21y

Combine like terms: 5y + -4y = 1y
-7 = -13 + 1y + -21y

Combine like terms: 1y + -21y = -20y
-7 = -13 + -20y

Solving
-7 = -13 + -20y

Solving for variable 'y'.

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

Add '20y' to each side of the equation.
-7 + 20y = -13 + -20y + 20y

Combine like terms: -20y + 20y = 0
-7 + 20y = -13 + 0
-7 + 20y = -13

Add '7' to each side of the equation.
-7 + 7 + 20y = -13 + 7

Combine like terms: -7 + 7 = 0
0 + 20y = -13 + 7
20y = -13 + 7

Combine like terms: -13 + 7 = -6
20y = -6

Divide each side by '20'.
y = -0.3

Simplifying
y = -0.3

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