A+s=70, s+l=80, l+a=80
from the first s=70-a which makes the second:
70-a+l=80
-a+l=10
a=l-10 which makes the third:
l+l-10=80
2l-10=80
2l=90
l=45
So Liam weighs 45 kg.
I'll show you how I do it,hope you'll like it.
5:7, 5+7=12
5/12×48 =20
7/12×48=28
answer=
5:7
= 20:28
hope it helps.....
12-3=9 they switch up and it still equals the same thing
