用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2
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用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2用消元法解方程;10X+Y+2Z=1,2
用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2
用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2
用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2
10X+Y+2Z=1 (1)
25X-3Y-Z=4 (2)
5X+5Y+5Z=2 (3)
(1)+(2)*2
10X+Y+50X-6Y=1+8
60X-5Y=9 (4)
(2)*5+(3)
125X-15Y+5X+5Y=20+2
130X-10Y=22 (5)
(5)-(4)*2
130X-120X=22-18
10X=4
X=2/5
Y=(60X-9)/5=3
Z=25X-3Y-4=-3
sb
用消元法解方程;10X+Y+2Z=1,25X-3Y-Z=4,5X+5Y+5Z=2
解方程 Y=X+Z Y-Z=2 100Z+10Y+X-(100X+10Y+Z)=99 Y=X+ZY-Z=2100Z+10Y+X-(100X+10Y+Z)=99
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