Manhattan 5lbs : Algebra : Problem : 52

[n00bpron00bpron00b]

Hi Tommy,

Q) For the integers a,b,c, the sum of a and b is 75% of c

Col A : (3/4) (a+b)
Col B : (4/3) (c)

Is percentage of 0 or a negative value a valid condition to test ?
Do we not consider percentages only of non negative values ?

Thanks.

[tommywallach]

For the integers a,b,c, the sum of a and b is 75% of c

Col A : (3/4) (a+b)
Col B : (4/3) (c)

a + b = .75c

You know, you could do the algebra here to create the columns (i.e. multiply both sides by 3/4, to create Column A), but yeah, I think I'd just think about it logically.

A = 1
B = -1
C = 0

A = 0
B= 0
C = 0

And (D) is proven. There are no constraints other than the ones given in the common information (all variables must be integers), so we're safe with negatives and 0.

-t

[n00bpron00bpron00b]

Got it ! Thanks

[tommywallach]

No problem!