Question

The sum of 2 numbers is 18. The difference between 3 times the smaller number and the larger number is 10. Define variables and formulate a system of equations from this situation. What is the larger number? work please? :D

Answer 1

x + y = 18
3x - y = 10

sum the two equations:

4x = 28
x = 7

now plug in x = 7 back into the two equations :

7 + y = 18
3(7) - y = 10

you get y = 11

So the smaller number is 7, larger number is 11

Answer 2

thanks