Question

1)2. 4
3x+ 9x=3.2

8
2)x-0,2= 15

Answer 1

1)
2/3x+4/9x=3.2
10/9x=3.2
x=3.2/(10/9)
x=2.88
2)
x-0.2x=8/15
-0.2x=8/15
x=-2.6