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Find a number if: 3/7 of it is 2 1/4

User Dean Lunz
by
5.6k points

2 Answers

7 votes

Answer:

x=5 1/4

Explanation:

2 1/4=
(9)/(4)--->
(9)/(4) divided by 3 to find 1/7x---->
(3)/(4)=1/7x---> x=21/4---> x=5 1/4

User Loupi
by
4.9k points
3 votes

Answer:

The number is 5¹/₄

Explanation:

3/7 of it is 2 ¹/₄

let the it be represented as A

3/ 7 of A = 2 ¹/₄

3A/7 = 4X2+1/4 = 9/4

3A/7= 9/4

cross multiply

3A X4 = 9x7

12A = 63

A = 63/12 = 21/4= 5¹/₄

The number is 5¹/₄

User Shemeka
by
4.3k points