问题
解答题
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答案
(1)1.5:12=6:x,
1.5x=12×6,
1.5x=72,
1.5x÷1.5=72÷1.5,
x=48;
(2)x:
=3 5
:2,5 6
2x=
×3 5
,5 6
2x=
,1 2
2x÷2=
÷2,1 2
x=
;1 4
(3)
=1.3 3.9
,20 x
1.3x=20×3.9,
1.3x=78,
1.3x÷1.3=78÷1.3,
x=60;
(4)x:
=0.875:5,24 7
5x=
×0.875,24 7
5x=3,
5x÷5=3÷5,
x=0.6;
(5)
:2 3
=x:0.5,5 6
x=5 6
×0.5,2 3
x=5 6
,1 3
x÷5 6
=5 6
÷1 3
,5 6
x=
;2 5
(6)
=x 0.15
,0.4 0.03
0.03x=0.15×0.4,
0.03x=0.06,
0.03x÷0.03=0.06÷0.03,
x=2.