Answer:
q = 0
Explanation:
We can substitute for x in the given equation, then solve for q.
Substitution
3x -4 = x +q . . . . . . given equation
3(2) -4 = 2 +q . . . . using 2 for x
6 -4 = 2 +q . . . . . eliminate parentheses
2 = 2 +q . . . . . . . simplify
Solution
Subtracting 2 from both sides of the equation gives the value of q.
2 -2 = 2 -2 +q . . . . subtract 2
0 = q . . . . . . . . . . . . simplify
If x=2, the value of q in the equation is zero (0).