The answer is 7, because you multiply it by 6.
Step-by-step explanation:
3x x 10 = 22
3x x 10 - 10 = 22 - 10
3x = 12
3x ÷ 3 = 12 ÷ 3
x = 4
5x + 8
5(4) + 8
20 + 8
28
Answer: Commutative property of addition
The order doesn't matter when it comes to adding.
The general rule can be written as x+y = y+x.
You have five numbers 
Among them there is one negative number
this number is smallest.
Note that

Since 6.25>6, then
and these numbers are less than 3
Note that
then
and these numbers are greater than 3.
Therefore, the correct order from the smallest to the greatest is:
