There is only one expression in the question and if there is only one it cannot have the same value as anything!
3
0.3 has the same value as 3/10 or thirty hundredths.
-7 plus 10 is the same as 10 minus 7, which is 3.
5+8 is the same as 10+3 = 13
x=7
No. 3.5 is the same as 3 plus 5/10 .
3/10 + 3/5. You make both denominators the same, so 3/5 is the same as 6/10. Therefore 3/10 + 3/5 is the same as 3/10 + 6/10 = 9/10.
-7
3 * 3 + 1 = 10
3
Whichever of them, if any, equals 9.
10