3(2+-1y)+y=13

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Solution for 3(2+-1y)+y=13 equation:


Simplifying
3(2 + -1y) + y = 13
(2 * 3 + -1y * 3) + y = 13
(6 + -3y) + y = 13

Combine like terms: -3y + y = -2y
6 + -2y = 13

Solving
6 + -2y = 13

Solving for variable 'y'.

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

Add '-6' to each side of the equation.
6 + -6 + -2y = 13 + -6

Combine like terms: 6 + -6 = 0
0 + -2y = 13 + -6
-2y = 13 + -6

Combine like terms: 13 + -6 = 7
-2y = 7

Divide each side by '-2'.
y = -3.5

Simplifying
y = -3.5

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