7(x-2)=0.35 3/2.5+1.2x=4.8 怎么解_数学解答

7(x-2)=0.35 3/2.5+1.2x=4.8 怎么解

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解答

7(x-2)=0.35
x-2=0.35/7
x=2+0.05
x=2.05
3/2.5+1.2x=4.8
1.2+1.2x=4.8
1.2x=3.6
x=3.6/1.2
x=3