4x+6等于18,请问x是?3.6x-2=2.32,请问x是?8x+24=56,请问x是?12.4x+7=7,请问x是?13.1-9x
问题描述:
4x+6等于18,请问x是?3.6x-2=2.32,请问x是?8x+24=56,请问x是?12.4x+7=7,请问x是?13.1-9x
等于9.5,请问x是?
答
4x+6=18
4x=12
x=3
3.6x-2=2.32
3.6x=4.32
x=1.2
8x+24=56
8x=32
x=4
12.4x+7=7
12.4x=0
x=0
13.1-9x=9.5
9x=3.6
x=0.4