Question

4x+5=21 solve by trial and error methord​

Answer 1

Answer:

taking x=2

4×2+5=21

13=/ 21

x=4

4×4+5=21

16+5=21

21=21

Hence Proved

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

4x+5=21

4x=21-5

4x=16

x=4

taking x=0

4(0)+5=21

5 is not eq 21

taking x=1

4+5=21

9 is not eq 21

taking x=2

8+5=21

13 is not eq 21

taking x=3

17 is not eq 21

taking x=4

21=21