12/11X-120%X=6.5打错了,应该是11/12X-120%X=6.5

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12/11X-120%X=6.5打错了,应该是11/12X-120%X=6.5
12/11X-120%X=6.5
打错了,应该是11/12X-120%X=6.5

12/11X-120%X=6.5打错了,应该是11/12X-120%X=6.5
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把它变成(11/12-14.4/12)X=6.5
即(55/60-72/60)X=6.5
x=-(60/17*6.5)
x=-39/17

715/12

12/11X-120%X=6.5
12/11X-12/100X=13/2
12/11X-6/5X=13/2
(60-66)/55X=13/2
-6/55X=13/2
X=(13/2)/(-6/55)
X=-715/12

-390/17

(11/12-14.4/12)X=6.5
解 (55/60-72/60)X=6.5
x=-(60/17*6.5)
x=-39/17