Find the solution in R :
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Originally Posted by dapore Find the solution in R : I think you can see from the second equation that . Substitute into the first equation: or .
Originally Posted by Prove It I think you can see from the second equation that . Substitute into the first equation: or . x=1, y=4-1=3 x=3, y=4-3=1
Hello, dapore! Here is another approach. It's no shorter, but it's rather "cute". Find the solution in R: . . . . . . . . . . Substitute into [2]: . . . . . . . Substitute into [3]: . Solutions: . 1,3),\3,1)" alt="(x,y) \:=\1,3),\3,1)" />
Thank you my friends
thus (1) Now put the second equation into (1) and get The solutions are and
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