9-3(y-1)=20

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Solution for 9-3(y-1)=20 equation: 


Simplifying
9 + -3(y + -1) = 20

Reorder the terms:
9 + -3(-1 + y) = 20
9 + (-1 * -3 + y * -3) = 20
9 + (3 + -3y) = 20

Combine like terms: 9 + 3 = 12
12 + -3y = 20

Solving
12 + -3y = 20

Solving for variable 'y'.

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

Add '-12' to each side of the equation.
12 + -12 + -3y = 20 + -12

Combine like terms: 12 + -12 = 0
0 + -3y = 20 + -12
-3y = 20 + -12

Combine like terms: 20 + -12 = 8
-3y = 8

Divide each side by '-3'.
y = -2.666666667

Simplifying
y = -2.666666667

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