3(1-y)=-42

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Solution for 3(1-y)=-42 equation: 


Simplifying
3(1 + -1y) = -42
(1 * 3 + -1y * 3) = -42
(3 + -3y) = -42

Solving
3 + -3y = -42

Solving for variable 'y'.

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

Add '-3' to each side of the equation.
3 + -3 + -3y = -42 + -3

Combine like terms: 3 + -3 = 0
0 + -3y = -42 + -3
-3y = -42 + -3

Combine like terms: -42 + -3 = -45
-3y = -45

Divide each side by '-3'.
y = 15

Simplifying
y = 15

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