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anonymous
 one year ago
please help? i'm stuck.
what is the x coordinate of the solution to the system?
2xyz=11
x+y4z=1
x+3y+z=10
anonymous
 one year ago
please help? i'm stuck. what is the x coordinate of the solution to the system? 2xyz=11 x+y4z=1 x+3y+z=10

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texaschic101
 one year ago
Best ResponseYou've already chosen the best response.1x + y  4z = 1 x + 3y + z = 10 add 4y  3z = 11 2x  y  z = 11 x + y  4z = 1  multiply by 2  2x  y  z = 11 2x  2y + 8z = 2 add 3y + 7z = 13 4y  3z = 11 multiply by 3 3y + 7z = 13  multiply by 4  12y  9z = 33 12y + 28z = 52 add 19z = 19 z = 1 3y + 7z = 13 3y + 7(1) = 13 3y + 7 = 13 3y = 13  7 3y = 6 y = 6/3 y = 2 x + y  4z = 1 x + (2)  4(1) = 1 x  2  4 = 1 x  6 = 1 x = 1 + 6 x = 5 check... 2x  y  z = 11 2(5)  (2)  1 = 11 10 + 2  1 = 11 12  1 = 11 11 = 11 (correct) x = 5, y = 2 and z = 1
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