150+50x=240-70x x的解
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![150+50x=240-70x x的解](/uploads/image/z/360841-49-1.jpg?t=150%2B50x%3D240-70x%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B+x%E7%9A%84%E8%A7%A3)
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150+50x=240-70x x的解
150+50x=240-70x x的解
150+50x=240-70x x的解
50x+70x=240-150
120x=90
x=3/4
50x+70x=240-150
120x=90
x=0.75
150+50x=240-70x
70x+50x=240-150
120x=90
x=90÷120
x=3/4
50X+70X=240-150
120X=90
X=90/150=3/5=0.6
移相得:50x+70x=240-150
120x=90
x=3/4
移项
120X=90
得X=0.75
150+50x=240-70x
50x+70x=240-150
120x=90
x=0.75
150+50X=240-70X
50X+70X=240-150
120X=90
x=90/120
x=3/4
x=0.75