Answer:
b= 5/4 or 1 1/4
Step-by-step explanation:
First I will make 1 3/4 into an improper fraction
1/2 + b = 7/4
Then I will make the fractions have common denominators
2/4 + b = 7/4
I subtract 2/4 from 7/4
b= 5/4
Answer:

Step-by-step explanation:

The answer is A because the x has different numbers