Question 553051: one number added to twice another number is 13. Four times the first number added to twice the other number is -2. what are the numbers Answer by TutorDelphia(193) (Show Source):
You can put this solution on YOUR website! Sub in a variables name for "one number" and "another number" and the question gets clearer:
a added to twice b is 13.
a+2b=13
Four times a added to twice b is -2
4a+2b=-2
Which gives me this system of equations
4a+2b=-2
a+2b=13
I'm going to subtract using the elimination method
3a=-15 (since 2b-2b cancels out)
a=-5
plug -5 in for a
-5+2b=13
2b=18
b=9
