2(X+X+0.5)=9.8

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2(X+X+0.5)=9.82(X+X+0.5)=9.82(X+X+0.5)=9.82(X+X+0.5)=9.82(2X+0.5)=9.84X+1=9.84X+1-1=9.8-14X=8.84X÷4=

2(X+X+0.5)=9.8
2(X+X+0.5)=9.8

2(X+X+0.5)=9.8
2(X+X+0.5)=9.8
2(2X+0.5)=9.8
4X+1=9.8
4X+1-1=9.8-1
4X=8.8
4X÷4=8.8÷4
X=2.2

2x+0.5=9.8/2=4.9
2X=4.4
X=2.2

2(x+x+0.5)=9.8
2x+2x+1=9.8
4x+1=9.8
4x =8.8
x=8.8÷4
x=2.2
希望能帮到你。采纳。Thanks

2(X+X+0.5)=9.8
4X+1=9.8
4X=8.8
X=2.2