Question

3. Verify by substitution that
(i) the root of 3x - 5 = 7 is x = 4

solve it in liner equation by the trial and error method​

Answer 1

Answer:

Answer

3x−5=7

Given root x=4

LHS=3(4)−5=12−5=7

RHS=7

LHS=RHS

∴x=4 is the root

Answer 2

Answer:

4

Step-by-step explanation:

Given x = 4 is the root of 3x – 5 = 7

Now, substituting x = 4 in place of ‘x’ in the given equation, we get

= 3(4) – 5 = 7

= 12 – 5 = 7

7 = 7

Since, LHS = RHS

Hence, x = 4 is the root of 3x – 5 = 7.