前>>183
>>185
X=450,000+0.125Y+0.1Z
Y=720,000+0.1X
Z=367,500+0.1X+0.125Y
Y-Z=352,500-0.125Y
X+Y-Z=802,500+0.1Z
X+Y=802,500+1.1Z
8X+Y+0.8Z=3,600,000+720,000+0.1X+0.08X+0.1Y
7.82X+0.9Y+0.8Z=4,320,000
-6.82X+0.1Y=-3,517,500+1.9Z
0.1X+0.1Y=80,250+0.11Z
6.92X+1.79Z=3,597,750
X+720,000+0.1X=802,500+1.1Z
1.1(X+Z)=82,500
X+Z=7,500
1.79X+1.79Z=179×75=53700/4=13,425
5.13X=3,584,325
X=358,432,500/513
=119,477,500/171
Y=720,000+11,947,750/171
=123,120,000/171
Z=7,500-X
=7,500-119,477,500/171
=(1,282,500-119,477,500)/171
=-118,195,000/171