Question

Solve the following equations by trial and
error method.
(i) 7m - 6 = 2m +9 ​

Answer 1

Answer:

m=3

Step-by-step explanation:

7m-6=2m+9

7m-2m=9+6

5m=15

m=15/5

m=3

Answer 2

Step-by-step explanation:

Let, m = 1 ,then

LHS = 7-6 = 1, RHS = 2+9=11

here left hand side is not equal to right hand side.

Let, m = 2 ,then

LHS = 14-6 = 8 , RHS = 4+9 = 13

LHS is not equal to RHS.

Let m= 3

LHS = 21-6 = 15 , RHS = 6+9 =15

HERE, LHS = RHS

Thus, m = 3 is correct answer