7(-1)-2y=13

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Solution for 7(-1)-2y=13 equation: 


Simplifying
7(-1) + -2y = 13

Multiply 7 * -1
-7 + -2y = 13

Solving
-7 + -2y = 13

Solving for variable 'y'.

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

Add '7' to each side of the equation.
-7 + 7 + -2y = 13 + 7

Combine like terms: -7 + 7 = 0
0 + -2y = 13 + 7
-2y = 13 + 7

Combine like terms: 13 + 7 = 20
-2y = 20

Divide each side by '-2'.
y = -10

Simplifying
y = -10

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