Home > AC > Chapter 8 > Lesson 8.1.4 > Problem8-41

8-41.

Find three consecutive numbers whose sum is $138$ by writing and solving an equation.

Write an equation to solve the problem.
first number $=x$
second number $=x+1$
third number $=x+2$
$x+(x+1)+(x+2)=138$

$3x+3=138$
Solve for $x$.
$3x=135$
$x=45$