Question

please answer faster with explanation ​

Answer 1

Answer:

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Step-by-step explanation:

so let the required two digit number be 10x+y

wherein digit at tens place is x and that of units place is y

so number obtained by reversing digits is

10y+x

according to the first condition

10x+y+10y+x=143

ie 11x+11y=143

so x+y=13 (1)

according to the second condition

x-y=5 (2)

adding (1) and (2)

we get

2x=18

ie x=9

substitute value of x in any of two equations

we get y=4

thus then our required two digit number=10x+y

=(10×9)+4

=90+4

=94

so thus then

94×(9+4)

=94×13

=1222

also thus then reversed digit=49

so 49×13

=637

thus option d is ryt