Question 992198: Twice a number minus a second number is -1. Twice the second number added to three times the first number is 9. Find the number. Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Twice a number minus a second number is -1. Twice the second number added to three times the first number is 9. Find the number.
let x=number
let y=2nd number
2x-y=-1
y=-2x+1
plug in y for x
2(-2x+1)+3x=9
-4x+2+3x=9
x=7
number=7
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