如题，现在有8个未知数和6个不等式：
y1=110.477507+a*0.082607+b*0.047764+c*0.052794+d*0.119857-e*0.025705+f*0.121649+g*0.121993-h*0.001518<165
y2=131.352061-a*0.054717+b*0.127501-c*0.000146+d*0.033224+e*0.086667-f*0.112686-g*0.018644+h*0.098528<150
y3=-108.992835-a*0.069387+b*0.061985-c*0.156500-d*0.009871+e*0.124669+f*0.002356-g*0.002787-h*0.201194<160
y4=77.611581-a*0.034632-b*0.102778+c*0.205037-d*0.020882-e*0.012018+f*0.005693+g*0.145218+h*0.076336<155
y5=133.133383+a*0.000327+b*0.242834-c*0.064710-d*0.041202-e*0.065452+f*0.070026-g*0.003896-h*0.009170<132
y6=120.848112+a*0.237570-b*0.060693-c*0.078055+d*0.092897+e*0.046634-f*0.000291+g*0.166359+h*0.000388<162
怎么求解abcdefgh这8个自变量的范围啊？谢谢
y1=110.477507+a*0.082607+b*0.047764+c*0.052794+d*0.119857-e*0.025705+f*0.121649+g*0.121993-h*0.001518<165
y2=131.352061-a*0.054717+b*0.127501-c*0.000146+d*0.033224+e*0.086667-f*0.112686-g*0.018644+h*0.098528<150
y3=-108.992835-a*0.069387+b*0.061985-c*0.156500-d*0.009871+e*0.124669+f*0.002356-g*0.002787-h*0.201194<160
y4=77.611581-a*0.034632-b*0.102778+c*0.205037-d*0.020882-e*0.012018+f*0.005693+g*0.145218+h*0.076336<155
y5=133.133383+a*0.000327+b*0.242834-c*0.064710-d*0.041202-e*0.065452+f*0.070026-g*0.003896-h*0.009170<132
y6=120.848112+a*0.237570-b*0.060693-c*0.078055+d*0.092897+e*0.046634-f*0.000291+g*0.166359+h*0.000388<162
怎么求解abcdefgh这8个自变量的范围啊？谢谢
