3+(-78)=x

Solution for 3+(-78)=x equation:

Simplifying
3 + (-78) = x
3 + -78 = x

Combine like terms: 3 + -78 = -75
-75 = x

Solving
-75 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-75 + -1x = x + -1x

Combine like terms: x + -1x = 0
-75 + -1x = 0

Add '75' to each side of the equation.
-75 + 75 + -1x = 0 + 75

Combine like terms: -75 + 75 = 0
0 + -1x = 0 + 75
-1x = 0 + 75

Combine like terms: 0 + 75 = 75
-1x = 75

Divide each side by '-1'.
x = -75

Simplifying
x = -75