Need help with relatively easy question

  • #1
101
0
Find integers A and B such that (4,1) and (-5,-3) are solitions to Ax + By = 7
 

Answers and Replies

  • #2
Zurtex
Science Advisor
Homework Helper
1,120
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Plug them into x and y to get:

4A + B = 7

and

-5A + -3B = 7

And solve :smile:
 
  • #3
379
0
try putting the coefficients and answers into a matrix and Row reduce....

oh... sorry, just finished a semester in Linear Algebra :-)

but really... you have 2 equations that are equal to each other ad 2 unknowns... that is easy to solve just read the math book you have (I know, I know who reads a math book :-D )
 

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