Question

RS SECTION (HOTS)
19. A number consists of two digits whose sum
is 9. If 27 is added to the number its digits
are interchanged. Which of the given steps
is CORRECT to find the number?
Step 1: Let the unit's digit bex
Step 2: Then, ten's digit (9)
Number 10.x (9) + X
90 10x + x = (90 9x)
Step 3: Adding 27 to the number 909x,
we get 117 - 9x
Step 4: Number with digits interchanged is
10x + (9 ) = 9x + 9
Step 5:117 - 9x = 9x + 9.
Step 6: Therefore unit's digit = 6 and ten's
digit = 3
Step 7: Hence the number = 36.
(A) Only Step 4
(B) Both Step 1 and Step 2
(C) Step 1, 2, 3 and 4
(D) All steps are correct
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Answer 1

Answer:

yes all are right but easy and other way is

Step-by-step explanation:

1. let unit digit be x
2. so ten's digit will be 9-x
3. so the digit is 10(9-x)+x
4. on adding 27 number will be 10x +(9-x)
5. that is 10(9-x)+x+27=10x+(9-x)

90-10x+x+27=10x+9-x

117-9x=9x+9

18x=108

x=6

so number is 36

hope it helps you

please mark the answer as Branliest.

Answer 2

Answer:

let the number be x

(-6)^-1 * x = ( 9 )^-1

= > 1 / 6 * x = 1 / 9

= > x = 1 / 3 x ( - 2 ) / 1

= > - 2 / 3 .

Step-by-step explanation: