求未知数x: 14:18=x:110 1.250.25=x1.6
求未知数x:14:18=x:1101.250.25=x1.625%x÷15=40...
求未知数x: 14:18=x:110 1.250.25=x1.6 25%x÷15=40
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根据题意可得:
(1)
:
=x:
,
x=
×
,
x=
,
x÷
=
÷
,
x=
;
(2)
=
,
0.25x=1.25×1.6,
0.25x=2,
0.25x÷0.25=2÷0.25,
x=8;
(3)25%x÷
=40,
25%x÷
×
=40×
,
25%x=8,
25%x÷25%=8÷25%,
x=32.
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