3(×-2.1)=10.5解方程

2024-12-12 17:19:55
推荐回答(2个)
回答1:

3(Ⅹ十2、1)=10、5
解:x+2.1=10.5÷3
x+2.1=3.5
x=3.5-2.1
x=1.4
检验:
左边=3x(1.4+2.1)
=3x3.5
=10.5
=右边

回答2:

x-2.1=10.5÷3
x-2.1=3.5
x=5.6