SOLUTION: Twice a first number plus a second number is 42, and the first number minus the second number is-6 . Find the numbers.

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Question 671285: Twice a first number plus a second number is 42, and the first number minus the second number is-6 . Find the numbers.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
let the two numbers be a & b
:
Write an equation for each statement, then use elimination
"Twice a first number plus a second number is 42,"
and "the first number minus the second number is-6"
:
2a + b = 42
a - b = -6
--------------adding eliminates b, find a
3a = 36
a = 36/3
a = 12
:
I'll let you find b