Question

please answer with full explanation. Question 18 ,19

Answer 1

solved
a18) 18
a19) x=8 y=2

Answer 2

18)
let the age of Rahim be x years (at present).
according to given information we can write 32+x = 5(x-8)
=> 32+x = 5x-40
=> 4x = 72
=> x = 18 years
 
19) 
let the number of 50-paisa coins be x
therefore 25 paisa coins will be 4x
given, 
4x(25)+x(50) = 3000 (convert rupees to paisa)
150x = 3000
x= 20
therefore there are 20 fifty- paisa coins and 20*4= 80 twentyfive paisa coins.

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