SOLUTION: Solve Problems Using Linear Systems 2. James looks in his TV cabinet and finds some old Beta and VHS tapes. He has 17 tapes in all. He finds that he has three more Beta tapes than

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Solve Problems Using Linear Systems 2. James looks in his TV cabinet and finds some old Beta and VHS tapes. He has 17 tapes in all. He finds that he has three more Beta tapes than      Log On


   

Question 185664: Solve Problems Using Linear Systems
2. James looks in his TV cabinet and finds some old Beta and VHS tapes. He has 17 tapes in all. He finds that he has three more Beta tapes than VHS tapes. How much many of each type does he have?
(The answer is: 10 Beta tapes and 7 VHS tapes, but i dont know how solve this problem?) Thank you very much!!!
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
"He has 17 tapes in all" ___ B+V=17

"He finds that he has three more Beta tapes than VHS tapes" ___ B=V+3

substituting ___ (V+3)+V=17 ___ 2V+3=17 ___ 2V=14 ___ V=7

substituting ___ B+(7)=17 ___ B=10