问题
解答题
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答案
(1)2X+3×0.9=24.7,
2X+2.7=24.7,
2X+2.7-2.79=24.7-2.7,
2X÷2=22÷2,
X=11;
(2)0.3:x=17:51,
17x=0.3×51,
17x÷17=15.3÷17,
x=0.9;
(3)
=0.5,3.2 X
0.5x=3.2,
0.5x÷0.5=3.2÷0.5,
x=6.4.
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(1)2X+3×0.9=24.7,
2X+2.7=24.7,
2X+2.7-2.79=24.7-2.7,
2X÷2=22÷2,
X=11;
(2)0.3:x=17:51,
17x=0.3×51,
17x÷17=15.3÷17,
x=0.9;
(3)
=0.5,3.2 X
0.5x=3.2,
0.5x÷0.5=3.2÷0.5,
x=6.4.