82-0.4x=40怎摸解方程?

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82-0.4x=40怎摸解方程?
82-0.4x=40怎摸解方程?

82-0.4x=40怎摸解方程?
82-0.4x=40
0.4x=82-40
0.4x=42
x=42÷0.4
x=105

82-0.4x=40
0.4x=40-82
0.4x=-42
x=-42/0.4
x=-105

82-0.4X=40
0.4X=82-40
0.4X=42
X=42/0.4
X=105

82-40=0.4x
0.4x=42
x=42/0.4=105

82-40=0.4x
0.4x=42
x=42/0.4=105