Question

Sum of two digit of twi digited numberis 7. If 9 is subtracted from it. The digits are reversed. Find the number

Answer 1

Answer:

40 becuse when we take a number than we get this

Answer 2

Answer:

Step-by-step explanation:

Let no. Be 10x +y

ATQ. X+y =7 _(1)

10x +y -9 =10y + x

10x - x + y - 10 y = 9

9x - 9y =9

OR

X-y =1 _(2)

Sub eq (1) and (2)

X+y = 7}

X- y = 1}

-. -. -= 2y = 6

Y = 3 putting value of y in (1) x+3 = 7

X=4