Question

solve the following equation and verify the result (a) 3a-42=18
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Answer 1

Answer:

a = 20

Step-by-step explanation:

3a-42= 18

3a= 18+42

3a= 60

a= 60/3

a= 20

Verify-

3×20 - 42 = 18

60- 42 = 18

18 = 18

L.H.S= R.H.S

Answer 2

$\huge\purple{Required \: Answer :}$

$a = 20$

Given :

$3a - 42 = 18$

Solution :

$3a - 42 = 18 \\ 3a = 18 + 42 \\ 3a = 60 \: \: \: \: \: \: \: \: \: \: \\ a = \frac{60}{3} \: \: \: \: \: \: \\ a = 20 \: \: \: \: \: \: \:$

Verification :

LHS :

= 3a - 42

= 3(20) - 42

= 60 - 42

= 18

RHS :

= 18

Hence,

18 = 18

LHS = RHS

It's Verified !

$\huge\sf\implies{Thanks : ❤}$