Problema Solution
A second number is five times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 415, find the number.
Answer provided by our tutors
let the first number be x, then the second number is 5x, and the third number is x+100. The sum of these three numbers is 415.
x+5x+(x+100) = 415 Combine like-terms.
7x+100 = 415 Subtract 100 from both sides.
7x = 315 Divide both sides by 7.
x = 45
5x = 225
x+100 = 145.
Check:
45+225+145 = 415