(x-2)/30+(x-3)/45+x/90=1
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(x-2)/30+(x-3)/45+x/90=1
(x-2)/30+(x-3)/45+x/90=1
(x-2)/30+(x-3)/45+x/90=1
x/30-2/30+x/45-3/45+x/90=1
3x-6+2x-6+x=90
6x=102
x=17
(x-2)/30+(x-3)/45+x/90=1
3(x-2)+2(x-2)+x=90
3x-6+2x-4+x=90
6x=100
x=50/3
关键在于两边同时乘以90,祝你考试顺利!
两边同时乘以90。就好解了,试试
30x-60+45x-135+x/90=1
75x-195+x/90=1
75x+x/90=196
x/6840=196
x=1340640
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(x-2)/30+(x-3)/45+x/90=1
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