40-x=3.9和48-x=5.6方程怎么解

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40-x=3.9和48-x=5.6方程怎么解
40-x=3.9和48-x=5.6方程怎么解

40-x=3.9和48-x=5.6方程怎么解
40-x=3.9
x=40-3.9
x=36.1
48-x=5.6
x=48-5.6
x=42.4

40-x=3.9
x=40-3.9
x=36.1
48-x=5.6
x=48-5.6
x=42.4