已知4x-3y-6z=0,x+2y-7z=0,且x,y,z都不为零.求(3x+2y+z)/(x+2y+3z)的值.{x+y=90{40%x+78%y=60%*95

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/30 06:52:16
xn@_ŗHI];Nl">EC!"hi]8MNNyvơpA\c7ZMr1>:5JàU,f~ߩo~;=^< y\w Б]\0@ZUP(ƣ'ߩw3N}l^!QW*$BP:]w{.7n1+_uGvHM\{^I+"n!/9543mHh1sQLT8 Tb & ԁ`@@JEQVR{zA;L&at%⛍cc'KL )`IJVhN),X3tt=٫tr8j82PM+'R 2ߠhDϠ,j2[vu^ߏ/hчz;7;]̓C͍%I0e{dΘltt`/+QUu9xVD⳶8,r5l*|Կ~ʭS}