(x×40%+5)+【(x×40+5)】×80%=12
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 18:44:33
![(x×40%+5)+【(x×40+5)】×80%=12](/uploads/image/z/1633910-14-0.jpg?t=%28x%C3%9740%25%2B5%29%2B%E3%80%90%28x%C3%9740%2B5%29%E3%80%91%C3%9780%25%3D12)
(x×40%+5)+【(x×40+5)】×80%=12
(x×40%+5)+【(x×40+5)】×80%=12
(x×40%+5)+【(x×40+5)】×80%=12
(x×40%+5)+(x×40+5)×80%=12
(0.4x+5)+(32x+4)=12
32.4x+9=12
32.4x=3
x=0.09
(0.4x+5)+0.8(0.4x+5)=12
(1+0.8)(0.4x+5)=12
0.4x+5=12÷1.8
0.4x+5=20/3
0.4x=20/3-5=5/3
x=5/3÷0.4
x=4又6分之1