问题 解答题
求未知数X:
X-1.8=5.4X-0.5=6X+
5
4
X=
27
16
答案

(1)X-1.8=5.4,

X-1.8+1.8=5.4+1.8,

X=7.2;

(2)X-0.5=6,

X-0.5+0.5=6+0.5,

X=6.5;

(3)X+

5
4
X=
27
16

9
4
X=
27
16

9
4
X÷
9
4
=
27
16
÷
9
4

X=

3
4

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