Question

the root of 3x-5=7 is x = 4​

Answer 1

Answer:

If f(x) => 3x-5=7 and g(x) => x =7

We need to substitute x in f(x) with 7.

So,

(3x4)-5=7

12-5=7

7=7 LHS=RHS

Hence, x=5 is the root of 3x-5=7.

Hope it is helpful ;)