Question

solve the following equations by trail and error method 5m+2=12

Answer 1

put values starting from 1 until u get the RHS.

if u will put m=1
LHS=7 which is not equal to 12

if u will put m=2
LHS=12 which is equal to RHS
Hence the value of m for satisfying the equation=2


Hope u got that

Answer 2

Hi your answer is
m=1
then 5+2=7 ( this is not the answer)
m=2
then 10+2=12(this is the correct one)
it is proved that m=2.