问题
解答题
已知x，y，z满足
|
答案
∵
=2 x
=3 y-z
=5 z+x
，1 k
∴x=2k，y-z=3k，x+z5k，
∴y=6k，z=3k．
∴
=5x-y y+2z
=5×2k-6k 6k+2×3k
=4k 12k
．1 3
搜题请搜索小程序“爱下问搜题”
已知x，y，z满足
|
∵
=2 x
=3 y-z
=5 z+x
，1 k
∴x=2k，y-z=3k，x+z5k，
∴y=6k，z=3k．
∴
=5x-y y+2z
=5×2k-6k 6k+2×3k
=4k 12k
．1 3