Question

solve substitution the root of 3x-5= 7 is x=4

Answer 1

3x-5=7 ........................(i)
putting x=4 in LHS of (i) we get
LHS=3*4-5
=12-5
=7
LHS= RHS
4 is the root of the equation.

Answer 2

Answer:

x=4

Step-by-step explanation:

if we use trial and error method

x. LHS. RHS

2. 3×2 - 5 = -2. 7

4. 3×4 - 5 = 7. 7

6. 3×6 - 5 = 13. 7

Thus , x = 4

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