+278 Pearl writes down seven consecutive integers, and adds them up. The sum of the integers is equal to 28/5 times the largest of the seven integers. What is the smallest integer that Pearl wrote down?
+1826 We can set up an equation to help us solve this problem. Let's define a variable.
Let n be the smallest number. We have \(n + n+1 + n+2 ....... n+6 = 7n + 21\)
Now, this sequence adds up to 28/5 times the largest number, n + 6, so we can write the equation
\(7n+21=28/5(n+6)\)
From here, we just solve for n. We have
\(7n+21=\frac{28}{5}n + 168/5\\ 7/5n=63/5\)
Now, multiplying both sides by the reciprocol of 7/5, we get
\(n=\frac{63}{5} \cdot \frac{5}{7}=9\)
So 9 is our final answer!
Thanks! :)
+1826 We can set up an equation to help us solve this problem. Let's define a variable.
Let n be the smallest number. We have \(n + n+1 + n+2 ....... n+6 = 7n + 21\)
Now, this sequence adds up to 28/5 times the largest number, n + 6, so we can write the equation
\(7n+21=28/5(n+6)\)
From here, we just solve for n. We have
\(7n+21=\frac{28}{5}n + 168/5\\ 7/5n=63/5\)
Now, multiplying both sides by the reciprocol of 7/5, we get
\(n=\frac{63}{5} \cdot \frac{5}{7}=9\)
So 9 is our final answer!
Thanks! :)
