解方程.12.5%X-2.5%X=9
问题描述:
解方程.12.5%X-2.5%X=9
答
10%X=9 x=90
答
10%x=9,x=90
答
90
答
12.5%X-2.5%X=9
10%x=9
x=9÷10%
x=90
答
12.5%X-2.5%X=9
0.1X=9
X=9/0.1
X=90
答
12.5%X-2.5%X=9
10%X=9
0.1X=9
X=9÷01
X=90
答
12.5%X-2.5%X=(12.5%-2.5%)X=10%X
10%X=9
X=90