问题
解答题
求未知数x: (1)2.4×1.5+1.2x-0.6=7.2(2)
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答案
(1)2.4×1.5+1.2x-0.6=7.2,
3.6+1.2x-0.6=7.2,
1.2x+3=7.2,
1.2x+3-3=7.2-3,
1.2x÷1.2=4.2÷1.2,
x=3.5;
(2)
:18%=3 20
,6.5 x
x=18%×6.5,3 20
x×3 20
=20 3
×117 100
,20 3
x=7
.4 5