3(-1)-2y=13

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


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

Multiply 3 * -1
-3 + -2y = 13

Solving
-3 + -2y = 13

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 + -2y = 13 + 3

Combine like terms: -3 + 3 = 0
0 + -2y = 13 + 3
-2y = 13 + 3

Combine like terms: 13 + 3 = 16
-2y = 16

Divide each side by '-2'.
y = -8

Simplifying
y = -8

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