Question

a:b =1:2 find 3(a-b)

Answer 1

a / b = 1 / 2

= 2a = b (Cross multiplication )

3 ( a - 2a )

= - 3a Answer.

Answer 2

Answer:

a / b = 1 / 2

2a = b

So

3 ( a - b)

3 ( a - 2a)

3 ( - a)

-3a

Thanks!