He earn around $36629 as intrest.
so usually intrested is calculated according to the percentage.
some monthly and annually.
so you cannot have negative number for %
and he gained then there no way .then have negative number..
Assume the second number is x, then the other two are x - 2, x + 2
So x-2 + x + x + 2 = 51
-> 3x = 51
-> x = 17
Second option:
-7x^2+4x+2
we are given
exterior angle is 18
so,

now, we can use formula
number of sides of regular polygon = 360/(exterior angle)
so, we get


so, number sides is 20..........Answer
28(y-1/7)= 28y-4
this deals with reducing fractions to their lowest terms.