题目内容
4X+0.4X=70.4
3X+90%×4=9
X-120%=6.5.
3X+90%×4=9
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(1)4X+0.4X=70.4,
4.4X=70.4,
4.4X÷4.4=70.4÷4.4,
X=16;
(2)3X+90%×4=9,
3X+3.6=9,
3X+3.6-3.6=9-3.6,
3X=5.4,
3X÷3=5.4÷3,
X=1.8;
(3)
X-120%=6.5,
X-120%+120%=6.5+120%,
X=7.7,
X×
=7.7×
,
X=8.4.
4.4X=70.4,
4.4X÷4.4=70.4÷4.4,
X=16;
(2)3X+90%×4=9,
3X+3.6=9,
3X+3.6-3.6=9-3.6,
3X=5.4,
3X÷3=5.4÷3,
X=1.8;
(3)
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X=8.4.
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