0.4×20+0.4x=20怎么解方程?

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0.4×20+0.4x=20怎么解方程?0.4×20+0.4x=20怎么解方程?0.4×20+0.4x=20怎么解方程?0.4×20+0.4x=208+0.4x=200.4x=20-80.4x=12x

0.4×20+0.4x=20怎么解方程?
0.4×20+0.4x=20怎么解方程?

0.4×20+0.4x=20怎么解方程?
0.4×20+0.4x=20
8+0.4x=20
0.4x=20-8
0.4x=12
x=12/0.4
x=30

0.4×20+0.4x=20
0.4x=20-8
0.4x=12
x=30

0.4×20+0.4x=20
8+0.4x=20
0.4x=12
x=30

8+0.4x=20
0.4x=20-8
0.4x=12
4x=120
x=30

0.4x20+0.4x=20
8+0.4x=20
所以 0.4x=12
所以 x=30

0.4x20+0.4X=20
0.4x(20+X)=20
20+X=20÷0.4
X=50-20
X=30


0.4×20+0.4x=20
8+0.4x=20
0.4x=20-8
0.4x=12
x=12/0.4
x=30

8+0.4x=20 0.4x=20-8 0.4x=12 x=30