0.386*(4.82+5.7+5.1+2.3)/3.86怎样简算?还有9*3-1.7=13.4解方程.是9×3-1.7X=13.4

0.386*(4.82+5.7+5.1+2.3)/3.86
=0.386/3.86*(4.82+5.7+5.1+2.3)
=0.1*17.92
-1.792
是不是9x-1.7=13.4
9x=13.4-1.7
9x=11.7
x=11.7÷9
x=1.3

0.386*(4.82+5.7+5.1+2.3)/3.86=(4.82+5.7+5.1+2.3)/10=17.92/10=1.792
9*3-1.7=13.4 这个好像有点不对

0.386*(4.82+5.7+5.1+2.3)/3.86
= (4.82+5.7+5.1+2.3)/10
= (4.82+5.1+5.7+2.3)/10
= (9.92+8)/10
= 17.92/10
= 1.792
9*3-1.7=13.4