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Use either substitution or elimination to solve
3x7y=5
x+3y=1
I used elimination..and got it wrong..I don't see how you can use two different ways of solving and get the same answer...Please explain..Thanks!
 2 years ago
 2 years ago
Use either substitution or elimination to solve 3x7y=5 x+3y=1 I used elimination..and got it wrong..I don't see how you can use two different ways of solving and get the same answer...Please explain..Thanks!
 2 years ago
 2 years ago

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jim_thompson5910Best ResponseYou've already chosen the best response.1
x+3y=1 x=13y  3x7y=5 3(13y)7y=5 39y7y=5 16y3=5 16y=5+3 16y=8 y=8/(16) y=1/2  x=13y x=13(1/2) x=1+3/2 x=2/2+3/2 x=(2+3)/2 x=1/2 So the solutions are x=1/2 and y=1/2
 2 years ago

becca18Best ResponseYou've already chosen the best response.0
Thanks! but that's substitution, what about elimination?
 2 years ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
3x7y=5 x+3y=1 3x7y=5 3(x+3y)=3(1) 3x7y=5 3x9y=3 16y=8 y=8/(16) y=1/2  x+3y=1 x+3(1/2)=1 x3/2=1 x=1+3/2 x=1/2
 2 years ago

becca18Best ResponseYou've already chosen the best response.0
Thanks I understand it so much better now!!(:
 2 years ago
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