The denominator of a certain fraction is two more than three times the numerator .If 7 were added to both the numerator and deminator of the fraction ,the new fraction would be equivalent to 3/5 .Which of the following is equivalent to the original fraction ?
Solution
Correct Answer: Option B
মনে করি ,ভগ্নাংশটির লব =x
এবং " হর =y
অতএব , ভগ্নাংশটি =x/y
প্রশ্নমতে ,y-2=3x
বা, y =3x+2......(i)
এবং (x+7)/(y+7)=3/5
বা, 5x+35=3y+21
বা, 5x-3y=-35+21
বা,5x-3y=-14
বা, 5x-3(3x+2)=-14
বা, 5x-9x-6 =-14
বা,-4x=-14+6
বা,-4x=-8
বা,x=2
অতএব,(i)
y=3.2+2
=8
অতএব ,ভগ্নাংশটি =2/8