Answer:
7/10
Step-by-step explanation:
Set up an equation to solve the problem
1/5 = 9/10 - x
Lets make them all have a common denominator
1/5 = 2/10
Subtract the 9/10
2/10 = 9/10 - x
- 9/10 - 9/10
-7/10 = -x
Since -x equals -7/10, that means positive x equals 7/10
The answer then comes out to:
x = 7/10
