The answer to the first volume of the sixth grade of synchronous practice mathematics in the new curriculum of Golden Coconut Wind
Solution: Let this number be XX×4/7=28. Shift term: X=28÷4/7 (both sides are divided by 4/7 at the same time) x = 28 × 7/4 (divided by a fraction equal to the reciprocal of this number) X= 196÷4 X=49.