Question

please also solve this question

Answer 1

your answer is 35 bcuz 5+35=40 and 7+35=42and 40/42=20/21


I hope this will help you

Answer 2

let the number be x

5+x/7+x=20/21

21(5+x) = 20(7+x)

105+21x = 140+20x

21x - 20x = 140-105

x=35

MARK BRAINLIEST