如题所述
ï¼1ï¼4åä¹x+3åä¹y=7ââ3x+4y=84ââ两边Ã2å¾ï¼3ï¼6x+8y=168
ï¼2ï¼3åä¹x+2åä¹y=8ââ2x+3y=48ââ两边Ã3å¾ï¼4ï¼6x+9y=144
ï¼3ï¼ä¸ï¼4ï¼ç¸å
y=-24ï¼ä»£å ¥å°ï¼2ï¼
2x=48-3y=48-(-72)=48+72=120
x=120/2=60
ï¼2ï¼3åä¹x+2åä¹y=8ââ2x+3y=48ââ两边Ã3å¾ï¼4ï¼6x+9y=144
ï¼3ï¼ä¸ï¼4ï¼ç¸å
y=-24ï¼ä»£å ¥å°ï¼2ï¼
2x=48-3y=48-(-72)=48+72=120
x=120/2=60
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