解方程:x÷0.8=12.5;

解方程:x÷0.8=12.5;4.2x+2.5x=13.4.
2025-02-23 16:48:28
推荐回答(1个)
回答1:

(1)x÷0.8=12.5,
    x÷0.8×0.8=12.5×0.8,
              x=10;

(2)4.2x+2.5x=13.4,
          6.7x=13.4,
.7x÷6.7=13.4÷6.7,
             x=2.