Question

0.4+x+2.8=5.6,用方程怎么解？

Answer 1

0.4+x+2.8=5.6
x=5.6－2.8－0.4
x=2.4

Answer 2

x=5.6-2.8-0.4

Answer 3

先把未知数跟已知数移到等号两边，变为 0.4x=5.6+2×1.2 =5.6+2.4=8 x=20