1.2x减0.8x=4.
问题描述:
1.2x减0.8x=4.
答
1.2x-0.8x=4.8
0.4x=4.8
x=12
1.2x减0.8x=4.
1.2x-0.8x=4.8
0.4x=4.8
x=12