4.5x+2.5(48-x)=48咋么做

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4.5x+2.5(48-x)=48咋么做4.5x+2.5(48-x)=48咋么做4.5x+2.5(48-x)=48咋么做4.5x+2.5(48-x)=484.5x+2.5*48-2.5x=482x=4

4.5x+2.5(48-x)=48咋么做
4.5x+2.5(48-x)=48咋么做

4.5x+2.5(48-x)=48咋么做
4.5x+2.5(48-x)=48
4.5x+2.5*48-2.5x=48
2x=48-2.5*48
2x=48*(1-2.5)
2x=-1.5*48
x=-36

4.5x+2.5(48-x)=48
4.5x+120-2.5x=48
4.5x-2.5x=48-120
2x=-72
x=-36

4.5x+2.5*48-2.5x=48
4.5x-2.5x+120=48
2x=48-120
2x=-72
x=-72÷2
x=-36