求未知数x的值:x+ 1 2 x= 4 5 9(x-1)=3(x+8)0.372:0744= 1 10 :x.
(1)x+
(1+
x=
(2)9(x-1)=3(x+8), 9x-9=3x+24, 9x-9+9=3x+24+9, 9x=3x+33, 9x-3x=3x+33-3x, 6x=33, 6x÷6=33÷6, x=
(3)0.372:0.744=
0.372x=0.744×0.1, 0.372x÷0.372=0.0744÷0.372, x=0.2. |
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