问题
解答题
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答案
(1)4.5x+x=11,
5.5x=11,
5.5x÷5.5=11÷5.5,
x=2;
(2)1.3x÷2=2.6,
1.3x÷2×2=2.6×2,
1.3x=5.2,
1.3x÷1.3=5.2÷1.3,
x=4;
(3)
x-4 5
=1 2
,2 5
x-4 5
+1 2
=1 2
+2 5
,1 2
x=4 5
,9 10
x×4 5
=5 4
×9 10
,5 4
x=
.9 8