Question

What has to be added to the sum of 4/7 and 7/4 to get 3?

Answer 1

`0.67858`

Explanation:

`(4)/(7)+(7)/(4)\\\mathrm{For}\:(4)/(7):\:\mathrm{multiply\:the\:denominator\:and\:numerator\:by\:}\:4\\(4)/(7)=(4\cdot \:4)/(7\cdot \:4)=(16)/(28)\\\mathrm{For}\:(7)/(4):\:\mathrm{multiply\:the\:denominator\:and\:numerator\:by\:}\:7\\(7)/(4)=(7\cdot \:7)/(4\cdot \:7)=(49)/(28)\\=(16)/(28)+(49)/(28)\\\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad (a)/(c)\pm (b)/(c)=(a\pm \:b)/(c)\\=(16+49)/(28)`

`\mathrm{Add\:the\:numbers:}\:16+49=65\\=(65)/(28)\\\mathrm{Decimal:\quad }\:2.32142\\3-2.32142=0.67858`

Answer 2

if you add 1 u get 3

Step-by-step explanation