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  • 11-08-2016
  • Mathematics
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3x+6y=30, 2x+7y=29 using elimination method

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Аноним Аноним
  • 11-08-2016
Solutions 

----- Solve using Elimination 

[tex]3x+6y=30 2x+7y=29[/tex] 

[tex]6x+12y=60 2x+7y=29[/tex] 

[tex]6x+12y=60 6x+21y=87[/tex] 

[tex] -9y=-27 [/tex] 

[tex]y=3 [/tex] 

Substitute y=3 into any of the two equations above 

[tex] 6x+12*3=60 [/tex] 

[tex]6x+36=60[/tex] 

[tex]6x=60-36 [/tex] 

[tex]6x=24[/tex] 

[tex]x= 24 / 6[/tex] 

[tex]x=4[/tex] 

[tex]x=4 y=3[/tex]

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