13.2x+9x=33.3 5.4x+x=12.8
问题描述:
13.2x+9x=33.3 5.4x+x=12.8
答
13.2x+9x=33.3
22.2x=33.3
x=33.3÷22.2
x=1.5
5.4x+x=12.8
6.4x=12.8
x=12.8÷6.4
x=2