Question

if you add 12 more to 30 percent of a number it would be one half of the original number. What is the number
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Answer 1

12+30%of x=x/2

12+30%=x/2

therefore 12 =20%

20%of x=12

20/100×x=12

therefore x=12×100/20

=12×5

=60

verification

let x=60

30% of 60+12

=30/100×60+12

=1800/100+12

=18+12

=30{which is 50% of 60}

{hence verified}

Answer 2

Answer:

12+30%of x=x/2

12+30%=x/2

therefore 12 =20%

20%of x=12

20/100×x=12

therefore x=12×100/20

=12×5

=60

verification

let x=60

30% of 60+12

=30/100×60+12

=1800/100+12

=18+12

=30