Question

Answer of Q-8 and 9
By step by method

Answer 1

Answer:

8 -: a. 5/7 is the correct answer

Answer 2

Answer:

8) let numerator be X and denominator be y

X+y=12

X=12-y

X/(y+3)=1/2

(12-y)/(y+3)=1/2

24-2y=y+3

24-3=y+2y

21=3y

y=7

X=12-y

X=12-7

x=5

Therefore the fraction is 5/7.

9)let the two numbers be X and y

sum=30

X+y=30__(1)

difference=16

x-y=16__(2)

Subtract equation (2) from (1)

X+y=30

(-)x-y=16

_______

2y=14

y=7

substitute y value in equation_(1)

X+7=30

X=30-7

X=23

Therefore the smaller number is 7.