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anonymous
 3 years ago
solve my substitution (medal and fan)
x  y  z = 8
4x + 4y + 5z = 7
2x + 2z = 4
anonymous
 3 years ago
solve my substitution (medal and fan) x  y  z = 8 4x + 4y + 5z = 7 2x + 2z = 4

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amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.1rewrite it x  y  z = 8 4x + 4y + 5z = 7 x + z = 2 from 3rd x=2z so put in 1st and 2nd one

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.1i divided the 3rd equation by 2 so have x+y=4/2=2

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.1let start from the begining x  y  z = 8 4x + 4y + 5z = 7 x + z = 2 from 1st equation xyz=8 x=8+y+z so multiply by 1 x=8yz

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.1put x=8yz in other equations 4x + 4y + 5z = 7 x + z = 2

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.14(8yz) + 4y + 5z = 7 (8yz)+ z = 2

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.14(8yz) + 4y + 5z = 7 (8yz)+ z = 2 >8y=2 >y=6 put that in above
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