Question

x-1的差除以0.3再减（x+2)的差除以0.5的商等于1.2解方程

Answer 1

x=0.4

（X-1）/0.3-(X-2)/0.5=1.2

0.5(X-1)/0.15-0.3(X-2)/0.15=1.2

0.5(X-1)-0.3(X-2)=0.18

0.5X-0.5-0.3X+0.6=0.18

(0.5-0.3)X=0.08

0.2X=0.08

X=0.4