Question 364067
20 and 50

20 is two-fifth's of 50

and 20 + 50 = 70

2/5X + X = 70

7/5X = 70

(5)(7/5X) = 70(5)
7X = 350
X = 50

2/5 of 50 = 20

20 + 50 = 70