9y+8(-7y-20)=20+9-20y

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Solution for 9y+8(-7y-20)=20+9-20y equation:


Simplifying
9y + 8(-7y + -20) = 20 + 9 + -20y

Reorder the terms:
9y + 8(-20 + -7y) = 20 + 9 + -20y
9y + (-20 * 8 + -7y * 8) = 20 + 9 + -20y
9y + (-160 + -56y) = 20 + 9 + -20y

Reorder the terms:
-160 + 9y + -56y = 20 + 9 + -20y

Combine like terms: 9y + -56y = -47y
-160 + -47y = 20 + 9 + -20y

Combine like terms: 20 + 9 = 29
-160 + -47y = 29 + -20y

Solving
-160 + -47y = 29 + -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.
-160 + -47y + 20y = 29 + -20y + 20y

Combine like terms: -47y + 20y = -27y
-160 + -27y = 29 + -20y + 20y

Combine like terms: -20y + 20y = 0
-160 + -27y = 29 + 0
-160 + -27y = 29

Add '160' to each side of the equation.
-160 + 160 + -27y = 29 + 160

Combine like terms: -160 + 160 = 0
0 + -27y = 29 + 160
-27y = 29 + 160

Combine like terms: 29 + 160 = 189
-27y = 189

Divide each side by '-27'.
y = -7

Simplifying
y = -7

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