15-3(y-1)=7

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Solution for 15-3(y-1)=7 equation: 


Simplifying
15 + -3(y + -1) = 7

Reorder the terms:
15 + -3(-1 + y) = 7
15 + (-1 * -3 + y * -3) = 7
15 + (3 + -3y) = 7

Combine like terms: 15 + 3 = 18
18 + -3y = 7

Solving
18 + -3y = 7

Solving for variable 'y'.

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

Add '-18' to each side of the equation.
18 + -18 + -3y = 7 + -18

Combine like terms: 18 + -18 = 0
0 + -3y = 7 + -18
-3y = 7 + -18

Combine like terms: 7 + -18 = -11
-3y = -11

Divide each side by '-3'.
y = 3.666666667

Simplifying
y = 3.666666667

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