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anonymous
 5 years ago
x10y=3 & 7y4x=21. Please show me to find an ordered pair.
anonymous
 5 years ago
x10y=3 & 7y4x=21. Please show me to find an ordered pair.

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you want a solution to both equations right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0in other words, these are two lines the cross at one point... and find that point right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0ill show you the elimination method. we start by stacking them on top of each other and we are going to "eliminate" one of the variables.... its cruel I know, but its gotta be done :) 4x +7y =21 x 10y =3 < mulitiply this one by (4) 4x +7y =21 4x 40y =12 ; now add the columns together  0 33y = 33 ^ see what happened here? we eliminated the "x"s now we can solve this for "y"

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.033y = 33 ; divide both sides by 33 to get: 33y/33 = 33/33 ; anything over itself = 1 y = 1 Since we know a "solid" value for "y"; plug it into any of the equations and solve for the "x"

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0x 10y =3 x 10(1) = 3 x  10 = 3 ; add 10 to both sides x 10+10 = 3+10 x0 = 7 x = 7 your ordered pair is (7,1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I wll have to look at this. This is something they do not show us in our books. Thank you very much.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I have some more problems like thisand will use this to see how it works out. Again Thank you.
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