3(1-3y)-y=7

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


Simplifying
3(1 + -3y) + -1y = 7
(1 * 3 + -3y * 3) + -1y = 7
(3 + -9y) + -1y = 7

Combine like terms: -9y + -1y = -10y
3 + -10y = 7

Solving
3 + -10y = 7

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 + -10y = 7 + -3

Combine like terms: 3 + -3 = 0
0 + -10y = 7 + -3
-10y = 7 + -3

Combine like terms: 7 + -3 = 4
-10y = 4

Divide each side by '-10'.
y = -0.4

Simplifying
y = -0.4

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