Kayasari Ryuunosuke
12/03/2017 at 08:37-
Give : \(\dfrac{x-1}{2}=\dfrac{y+3}{4}=\dfrac{z-5}{6}=k\)
\(\Rightarrow\left\{{}\begin{matrix}x=2k+1\\y=4k-3\\z=6k+5\end{matrix}\right.\)
Change x,y,z into 5z - 3x - 4y = 50 , we have :
5(6k + 5) - 3(2k + 1) - 4(4k - 3) = 50
30k + 25 - 6k - 3 - 16k + 12 = 50
8k + 34 = 50
8k = 16
=> k = 2
\(\Rightarrow\left\{{}\begin{matrix}x=2k+1=2.2+1=5\\y=4k-3=4.2-3=5\\z=6k+5=6.2+5=17\end{matrix}\right.\)
Kayasari Ryuunosuke selected this answer. -
35 Tiểu Bảo 03/04/2017 at 21:16Give : x−12=y+34=z−56=kx−12=y+34=z−56=k
⇒⎧⎪⎨⎪⎩x=2k+1y=4k−3z=6k+5⇒{x=2k+1y=4k−3z=6k+5
Change x,y,z into 5z - 3x - 4y = 50 , we have :
5(6k + 5) - 3(2k + 1) - 4(4k - 3) = 50
30k + 25 - 6k - 3 - 16k + 12 = 50
8k + 34 = 50
8k = 16
=> k = 2
⇒⎧⎪⎨⎪⎩x=2k+1=2.2+1=5y=4k−3=4.2−3=5z=6k+5=6.2+5=17
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hghfghfgh 26/03/2017 at 20:49Give : x−12=y+34=z−56=kx−12=y+34=z−56=k
⇒⎧⎪⎨⎪⎩x=2k+1y=4k−3z=6k+5⇒{x=2k+1y=4k−3z=6k+5
Change x,y,z into 5z - 3x - 4y = 50 , we have :
5(6k + 5) - 3(2k + 1) - 4(4k - 3) = 50
30k + 25 - 6k - 3 - 16k + 12 = 50
8k + 34 = 50
8k = 16
=> k = 2
⇒⎧⎪⎨⎪⎩x=2k+1=2.2+1=5y=4k−3=4.2−3=5z=6k+5=6.2+5=17
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→இے๖ۣۜBoy™†hïếuGîa 23/03/2017 at 17:18Give : x−12=y+34=z−56=kx−12=y+34=z−56=k
⇒⎧⎪⎨⎪⎩x=2k+1y=4k−3z=6k+5⇒{x=2k+1y=4k−3z=6k+5
Change x,y,z into 5z - 3x - 4y = 50 , we have :
5(6k + 5) - 3(2k + 1) - 4(4k - 3) = 50
30k + 25 - 6k - 3 - 16k + 12 = 50
8k + 34 = 50
8k = 16
=> k = 2
⇒⎧⎪⎨⎪⎩x=2k+1=2.2+1=5y=4k−3=4.2−3=5z=6k+5=6.2+5=17
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Hoang Duc Hai 12/03/2017 at 19:22Give : x−12=y+34=z−56=kx−12=y+34=z−56=k
⇒⎧⎪⎨⎪⎩x=2k+1y=4k−3z=6k+5⇒{x=2k+1y=4k−3z=6k+5
Change x,y,z into 5z - 3x - 4y = 50 , we have :
5(6k + 5) - 3(2k + 1) - 4(4k - 3) = 50
30k + 25 - 6k - 3 - 16k + 12 = 50
8k + 34 = 50
8k = 16
=> k = 2
⇒⎧⎪⎨⎪⎩x=2k+1=2.2+1=5y=4k−3=4.2−3=5z=6k+5=6.2+5=17
