17.5x-8.4=4.2-12.5x
问题描述:
17.5x-8.4=4.2-12.5x
答
17.5x+12.5x=4.2+8.4
30x=12.6
x=0.42
17.5x-8.4=4.2-12.5x
17.5x+12.5x=4.2+8.4
30x=12.6
x=0.42