Question

4. The value of x which satisfies the equation
3x + 1 = 10 and x+1 =4 is
(a) 4
(b) 3
(c) 2
(d) 1​

Answer 1

f(x) =3x-9, f(3) =9-9=0

f(x)=x-3, f(3) =3-3=0 s

so correct answer is b 3