Question

Please Answer With explanation​

Answer 1

i) 9x + 5 = 50

ii) 60 - 3x = 8

iii) 3/4 + 3 = 12

iv) 1/10x = 10

Answer 2

Answer:

9(i) 9x+5 = 50

9(ii) 50 - 3x = 8

9(iii) (3x/4)+3 = 21

9(iv) x/10 = 10

Step-by-step explanation:

9 (i) Add 5 to nine times a number ; You get 50

soln: let x be the number

=> nine times a number = 9x

so the answer is 9x+5 = 50

=> 9x = 50-5 = 45

=> x = 45/9 = 5

9 (ii) Rahul subtract thrice the number of notebook he has from 50, he finds the result to be 8

soln: let x be the number of notebooks

=> thrice the no. of notebooks = 3x

so the answer is 50 - 3x = 8

=> 3x = 50-8 = 42

=> x = 42/3 = 14 notebooks

9(iii) If i take three fourth of a number and add 3 to it, I get 21

soln: let x be the number,

=> three fourth of the number = (3/4)*x = 3x/4

so the answer is , (3x/4)+3 = 21 or 3x+12=84

3x +12 = 84

=> 3x = 84-12 = 72

=> x = 72/3 = 24

9(iv) one tenth of a number gives 10

soln: let x be the number

=> one tenth of a number = (1/10)*x = x/10

so the answer is, x/10 = 10

=> x = 10*10 = 100