Problema Solution
Whitney is thinking of two numbers. Adding 9 times the first number and 2 times the second number gives a total of 10. Also, adding 9 times the first number and 6 times the second number gives -6. What are the two numbers?
Answer provided by our tutors
let
x = the first number
y = the second number
Adding 9 times the first number and 2 times the second number gives a total of 10:
9x + 2y = 10
Also, adding 9 times the first number and 6 times the second number gives -6:
9x + 6y = -6
by solving the system of equations:
9x + 2y = 10
9x + 6y = -6
we find:
x = 2
y = -4
click here to see the step by step solution of the system of equations:
the two numbers are 2 and -4.