Question

to make an international telephone call, you need the code for the country you are calling. the codes for country a, country b, and c are three consecutive integers whose sum is 81. find the code for each country. country’s a code is , country’s b code is , and country’s c code is .

Explanation:

Step1: Let the first integer be $x$.

The three consecutive integers are $x$, $x + 1$, $x+2$.

Step2: Set up the sum - equation.

$x+(x + 1)+(x + 2)=81$.

Step3: Simplify the left - hand side of the equation.

$3x+3 = 81$.

Step4: Subtract 3 from both sides.

$3x=81 - 3=78$.

Step5: Solve for $x$.

$x=\frac{78}{3}=26$.

Step6: Find the other two integers.

$x + 1=26+1 = 27$, $x + 2=26+2=28$.

Answer:

Country's A code is 26, country's B code is 27, and country's C code is 28.