Question

15. A two-digit number is seven times the sum of​

Answer 1

Answer:

42

Step-by-step explanation:

Let the number be 10x+y.

Reversed number=10y+x.

According to question

10x+y=7(x+y)

10x+y=7x+7y

3x-6y=0

x-2y=0......(1)

10y+x=10x+y-18

9y-9x=-18

y-x=-2

x-y=2.......(2)

From (1) and (2)

y=2 and x=4

Number=42

Answer 2

Answer:

Step-by-step explanation:

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