(7)-2y=-1

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


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

Solving
7 + -2y = -1

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 = -1 + -7

Combine like terms: 7 + -7 = 0
0 + -2y = -1 + -7
-2y = -1 + -7

Combine like terms: -1 + -7 = -8
-2y = -8

Divide each side by '-2'.
y = 4

Simplifying
y = 4

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