-3=7-y

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Solution for -3=7-y equation: 


Simplifying
-3 = 7 + -1y

Solving
-3 = 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.
-3 + y = 7 + -1y + y

Combine like terms: -1y + y = 0
-3 + y = 7 + 0
-3 + y = 7

Add '3' to each side of the equation.
-3 + 3 + y = 7 + 3

Combine like terms: -3 + 3 = 0
0 + y = 7 + 3
y = 7 + 3

Combine like terms: 7 + 3 = 10
y = 10

Simplifying
y = 10

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