9-(8y-1)=2y+20

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Solution for 9-(8y-1)=2y+20 equation:


Simplifying
9 + -1(8y + -1) = 2y + 20

Reorder the terms:
9 + -1(-1 + 8y) = 2y + 20
9 + (-1 * -1 + 8y * -1) = 2y + 20
9 + (1 + -8y) = 2y + 20

Combine like terms: 9 + 1 = 10
10 + -8y = 2y + 20

Reorder the terms:
10 + -8y = 20 + 2y

Solving
10 + -8y = 20 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
10 + -8y + -2y = 20 + 2y + -2y

Combine like terms: -8y + -2y = -10y
10 + -10y = 20 + 2y + -2y

Combine like terms: 2y + -2y = 0
10 + -10y = 20 + 0
10 + -10y = 20

Add '-10' to each side of the equation.
10 + -10 + -10y = 20 + -10

Combine like terms: 10 + -10 = 0
0 + -10y = 20 + -10
-10y = 20 + -10

Combine like terms: 20 + -10 = 10
-10y = 10

Divide each side by '-10'.
y = -1

Simplifying
y = -1

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