6+x-(-3x)=

Solution for 6+x-(-3x)= equation:

Simplifying
6 + x + -1(-3x) = 0

Remove parenthesis around (-3x)
6 + x + -1 * -3x = 0

Multiply -1 * -3
6 + x + 3x = 0

Combine like terms: x + 3x = 4x
6 + 4x = 0

Solving
6 + 4x = 0

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 4x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 4x = 0 + -6
4x = 0 + -6

Combine like terms: 0 + -6 = -6
4x = -6

Divide each side by '4'.
x = -1.5

Simplifying
x = -1.5