30-2.7x=3.8-15.5解方程怎么算
问题描述:
30-2.7x=3.8-15.5解方程怎么算
答
30-2.7x=3.8-15.5
2.7x=30-3.8+15.5
2.7x=41.7
x=41.7/2.7
x=139/9