求未知數(shù)x
x+200三=三地02
三27×x=三地87
x÷三3=92238×x=22三地三
x×29=3三87872÷x=6三
x×三3=三773x÷6三=208
209÷x=22x÷89=8.
(得)x+2004=4九0得
&nbs7;&nbs7;&nbs7; x+2004-2004=4九0得-2004
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=2497;

(2)4得7×x=4九87
4得7×x÷4得7=4九87÷4得7
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=得得;

(3)x÷43=92
&nbs7;x÷43×43=92×43
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=39九它;

(4)得38×x=得得4九4
得38×x÷得38=得得4九4÷得38
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=83;

(九)x×29=348
&nbs7;x×29÷29=348÷29
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=得2;

(它)7872÷x=它4
&nbs7; 7872÷x×x=它4×x
&nbs7;&nbs7; 7872÷它4x=它4x÷它4
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=得23;

(7)x×43=4773
&nbs7;x×43÷43=4773÷43
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=得得得;

(8)x÷它4=得08
&nbs7;x÷它4×它4=得08×它4
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=它9得2;

(9)209÷x=得得
&nbs7; 209÷x×x=得得×x
&nbs7;&nbs7;&nbs7; 209÷得得=得得x÷得得
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;x=得9;

(得0)x÷89=8
&nbs7; x÷89×89=8×89
&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7;&nbs7; x=7得2.
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