(12-x)X2.5=12.5+x
3个回答
(12-x)X2.5=12.5+x
30-2.5x=12.5+x
3.5x=17.5
x=5
够详细吧
相关问题
5x+(8-x)=12.6x-(12+2x)=4怎么做5x+(8-x)=12.
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5（x-5）+2（x-12）=0
12-2x=1.5x+5