7=-3(1-2y)-3y

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Solution for 7=-3(1-2y)-3y equation:


Simplifying
7 = -3(1 + -2y) + -3y
7 = (1 * -3 + -2y * -3) + -3y
7 = (-3 + 6y) + -3y

Combine like terms: 6y + -3y = 3y
7 = -3 + 3y

Solving
7 = -3 + 3y

Solving for variable 'y'.

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

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

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

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

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

Combine like terms: -3 + -7 = -10
-3y = -10

Divide each side by '-3'.
y = 3.333333333

Simplifying
y = 3.333333333

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