Register
The sum of three numbers is 125. The second number is 3 times the third. The third number is 10 less than the first. What are the numbers?
114k views
3 votes
The sum of three numbers is 125. The second number is 3 times the third. The third number is 10 less than the first. What are the numbers?

User Pavlina
by
7.7k points

1 Answer

2 votes
form simultaneous equations.
a + b + c = 125
b = 3c
a = c +10
Substitute them back in:
c + 10 + 3c + c = 125
Solve for c:
5c + 10 = 125
5c = 115
c = 23
a = 23 + 10 = 33
b = 3 x 23 = 69
To check:
23 + 33 + 69 = 125, Which is correct
User Cobie
by
7.9k points
← Prev Question Next Question →

No related questions found

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Link Copied!