(4,9-x):1,2=3 3.8*(x-0,2)=2,28

Question

(4,9-x):1,2=3
3.8*(x-0,2)=2,28

Answer 1

1)(4,9-x):1,2=3 
(4,9-x)=3*1.2
4.9-x=3.6
-x=3.6-4.9
-x=-1.3
x=1.3

2)3.8*(x-0,2)=2,28
x-0,2=2.28/3.8
x-0,2= 0.6
x=0.8