80除以x=2.5×80除以x+2.5
80除以x=2.5×80除以x+2.5
80除以x=2.5×80除以x+2.5
80除以x=2.5×80除以x+2.5
80÷x=2.5×80÷x+2.5
80÷x=200÷x+2.5
120/x=-2.5
x=-48
两边乘于一个x有比过程吗?
80除以x=2.5×80除以x+2.5
80除以x=2.5×80除以x+2.5
80除以x=2.5×80除以x+2.5
80÷x=2.5×80÷x+2.5
80÷x=200÷x+2.5
120/x=-2.5
x=-48
两边乘于一个x有比过程吗?