ax-3=4x+4
ax-4x=7
x(a-4)=7
x=7/(a-4)
x>0
7/(a-4)>0
a-4>0
a>4
这是x为未知数的方程 ax-3=4x+4 的解为正数,求a的范围
这是x为未知数的方程 ax-3=4x+4 的解为正数,求a的范围
数学人气：278 ℃时间：2019-10-31 18:11:59
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