80(x+0.5)=100x 这个方程怎么解
问题描述：
80(x+0.5)=100x 这个方程怎么解
答
80(x+0.5)=100x
80x+40=100x
40=20x
x=2
答
80(x+0.5)=100x
40=100x-80x
x=2
答
80(x+0.5)=100x
所以
80x+40=100x
20x=40
x=2
答
80(x+0.5)=100x
x+0.5=5x/4
x-5x/4=-0.5
-x/4=-0.5
x=2