Question

solve :- 4x - 5 = 15 by trial and error method​

Answer 1

Answer:

4x-5=15

4x=15+5

4x=20

x=20/4

x=5

Answer 2

Step-by-step explanation:

Let x=0

then 4(0)-5=-5 which is not =15

hence x=0 is discarded

now let x=1

then 4(1)-5=-1 which is again not =15

hence x=1 is discarded too

We do this for 2,3 and 4 respectively and in each case x is not =15

now let x=5

then 4(5)-5=20-5=15

hence x=5 is the answer