42=y-(-47)

Solution for 42=y-(-47) equation:

Simplifying
42 = y + -1(-47)

Multiply -1 * -47
42 = y + 47

Reorder the terms:
42 = 47 + y

Solving
42 = 47 + 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.
42 + -1y = 47 + y + -1y

Combine like terms: y + -1y = 0
42 + -1y = 47 + 0
42 + -1y = 47

Add '-42' to each side of the equation.
42 + -42 + -1y = 47 + -42

Combine like terms: 42 + -42 = 0
0 + -1y = 47 + -42
-1y = 47 + -42

Combine like terms: 47 + -42 = 5
-1y = 5

Divide each side by '-1'.
y = -5

Simplifying
y = -5