问题
解答题
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答案
(1)x+40%x=98,
(1+40%)x=98,
1.4x=98,
1.4x÷1.4=98÷1.4,
x=70;
(2)2.5:x=0.4:0.2,
0.4x=2.5×0.2,
0.4x=0.5,
0.4x÷0.4=0.5÷0.4,
x=1.25.
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(1)x+40%x=98,
(1+40%)x=98,
1.4x=98,
1.4x÷1.4=98÷1.4,
x=70;
(2)2.5:x=0.4:0.2,
0.4x=2.5×0.2,
0.4x=0.5,
0.4x÷0.4=0.5÷0.4,
x=1.25.