7=-y

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Solution for 7=-y equation:


Simplifying
7 = -1y

Solving
7 = -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
7 + y = -1y + y

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

Add '-7' to each side of the equation.
7 + -7 + y = 0 + -7

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

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

Simplifying
y = -7

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