Question

if a number is added to the numerator of 3/4 and twice as much is added to the denominator, the result is 4/7. find the number

Answer 1

5 is the number

Answer 2

3/4 + x/2x =4/7

Answer 3

x/2x= 4/7 - 3/4

Answer 4

x/2x= - 5/28

Answer 5

2x(-5)=x(28)

Answer 6

-10x= 28x

Answer 7

unless x is 0, I did something wrong

Answer 8

Let n=the number to be added

(3+n)/(4+2n)=4/7
3+n=(4/7)(4+2n)
7(3+n)=4(4+2n)
21+7n=16+8n
21-16=8n-7n
5=n

To verify this answer you get:

(3+5)/(4+10)=8/14=4/7

Answer 9

Oh... thanks!