3(x-1.8)=15.3 (2.5+x)÷2=4.3 4(x+3.1)=16.8

问题描述:

3(x-1.8)=15.3 (2.5+x)÷2=4.3 4(x+3.1)=16.8

3(x-1.8)=15.3
x-1.8=5.1
x=6.9
(2.5+x)÷2=4.3
2.5+x=8.6
x=6.1
4(x+3.1)=16.8
x+3.1=4.2
x=1.1这是正确的吗绝对正确