解方程.(1)0.5X+1=1.5 &
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解方程.
(1)0.5X+1=1.5
(2)X-20%X=40.
(1)0.5X+1=1.5
(2)X-20%X=40.
![解方程.(1)0.5X+1=1.5 &](/uploads/image/z/733179-3-9.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%8E%EF%BC%881%EF%BC%890.5X%2B1%3D1.5%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26)
(1)0.5X+1=1.5,
0.5X=1.5-1,
0.5X=0.5,
X=1;
(2)X-20%X=40,
0.8X=40,
X=50.
0.5X=1.5-1,
0.5X=0.5,
X=1;
(2)X-20%X=40,
0.8X=40,
X=50.