x÷2+1.8=3.9怎么解方程?

2024-12-01 07:43:18
推荐回答(2个)
回答1:

x÷2+1.8=3.9
x÷2=3.9-1.8
x÷2=2.1
x=2.1*2
x=4.2

回答2:

x+3.6=7.8 x=4.2