To make an international telephone call, you need a the code the country you are calling. The codes for the country A, country B, and C are three consecutive integers whose sum is 90 find the code for each county

Let:

x = code for country A

This is important: "the codes are three consecutive integers" That means,

x is code for country A

(x+1) is code for country B

(x+2) is code for country C

whose sum is 81" means

x + (x+1) + (x+2) = 90

3x+3=90

=3x=90-3

=3x=87

=x=87/3

=x=29

So, the codes are=29,30,31

To check 29+30+31=90

coin flip

non-answer:

choosing

sorry if this isnt what you're looking for i dont really understand the question