you switch the numbers you put 10 over 9 its easy
0.9
Yes
9 + 9 = 18
It is: 0.3, 9/10 which is 0.9 and 1.4
0.5
7
It is 0.5
30%.
0.1
6/20
Not sure about slove, but to solve it: first combine like terms: 5x + 9 = 30 Then subtract 9 from both sides: 5x = 21 Finally, divide both sides by 5: x = 21/5 = 4.2
5/10 is a half.