A number consists of two digits.the digit at the teens place is twice that of the digit at the units place.if 18 is subtracted from the number, the digits are reversed.find the number.
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Step-by-step explanation:
let the one digit no. be x
ten digit=2x
no.=10(2x)+x
=20x+x
=21x
10x+2x
=12x
21x-18=12x
21x-12x=18
9x=18
x=18/9
x=2
tens digit=2x
=2*2
=4
the number=42
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