问题
解答题
求X的值. ①6×0.8-2X=1.6 ②
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答案
(1)6×0.8-2x=1.6,
4.8-2x+2x=1.6+2x,
4.8-1.6=1.6+2x-1.6,
3.2÷2=2x÷2,
x=1.6;
(2)
x+1 2
x=75,1 3
x÷5 6
=75÷5 6
,5 6
x=90;
(3)
=2.05 x
,0.2 1.6
0.2x=2.05×1.6,
0.2x÷0.2=3.28÷0.2,
x=16.4.