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DanielCamboim
@DanielCamboim
December 2019
1
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Resolva o sistema abaixo:
3/2x + 2/3 y =13
2x/5+y/3=3
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lazinhojose
Mmc=6
9x+4y=78........(1)
mmc=15
6x+5y=45.......(2)
18x+8y=156........(1)
18x+15y=135......(2)
(2)-(1)
15y-8y=135-156
7y=-21
y=-21/7
y=-3
Em.....(1)
9x+4(-3)=78
9x-12=78
9x=78+12
9x=90
x=90/9
x=10
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Lista de comentários
9x+4y=78........(1)
mmc=15
6x+5y=45.......(2)
18x+8y=156........(1)
18x+15y=135......(2)
(2)-(1)
15y-8y=135-156
7y=-21
y=-21/7
y=-3
Em.....(1)
9x+4(-3)=78
9x-12=78
9x=78+12
9x=90
x=90/9
x=10