解方程. x÷2.6=0.5 2(x+5)=17.8 x-0.45x=0.66.

2025-06-26 17:10:58
推荐回答(1个)
回答1:

(1)x÷2.6=0.5    x÷2.6×2.6=0.5×2.6              x=1.3(2)2(x+5)=17.8  2(x+5)÷2=17.8÷2          x+5=8.9        x+5-5=8.9-5            x=3.9(3)...