解方程:4×5.6-0.4x=20
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解方程:4×5.6-0.4x=20
4×5.6-0.4x=20
22.4-0.4x=20
移项
0.4x=22.4-20
0.4x=2.4
x=2.4÷0.4
x=6
4×5.6-0.4x=20
22.4-0.4x=20
0.4x=22.4-20
0.4x=2.4
x=6
4×5.6-0.4x=20
5.6-0.1x=5
-0.1x=5-5.6
-0.1x=-0.6
x=6
22.4-0.4x=20 0.4x=2.4 x=6
22.4-20=0.4x
0.4x=2.4
x=2.4/0.4
x=6