-3-(-7)=y

Solution for -3-(-7)=y equation:

Simplifying
-3 + -1(-7) = y

Multiply -1 * -7
-3 + 7 = y

Combine like terms: -3 + 7 = 4
4 = y

Solving
4 = y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
4 + -1y = y + -1y

Combine like terms: y + -1y = 0
4 + -1y = 0

Add '-4' to each side of the equation.
4 + -4 + -1y = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1y = 0 + -4
-1y = 0 + -4

Combine like terms: 0 + -4 = -4
-1y = -4

Divide each side by '-1'.
y = 4

Simplifying
y = 4