Question

solve the equation by trial and error
method
4 a =20​

Answer 1

Answer:

a=80

Step-by-step explanation:

4a = 20

a= 4*20

a= 80

Answer 2

Answer:

a = 5 . mark me as a brainlist

Step-by-step explanation:

u fool

simple question

given : 4 a =20.

solving :

by direct method :

$4a \: = 20 \\ a \: = \frac{20}{4} \\ a \: = 5$

By trial and error method:

(I)4a=20

$put \: the \: value \: of \: a \: = 0 \: we \: get$

4(0)=20

0 ≠ 20

hence 0 is not the value of a

( ii ) 4a=20 .put a = 1

4(1) = 20

4 ≠ 20

hence 1 is not the value of a

( iii ) 4a=20 .put a = 2 we get

4(2) = 20

8 ≠ 20

hence 2 is not the value of a

( iv ) 4a=20 .put a = 3 we get

4(3) = 20

12 ≠ 20

hence 3 is not the value of a

(v) 4a=20 .put a = 4 we get

4(4) = 20

16 ≠ 20

hence 4 is not the value of a

(vi) 4a=20 .put a = 5 we get

4(5) = 20

20 = 20

hence 5 is the value of a

trial and error method is long so it is preferable to do as direct method . u can able to do direct method if u know tables