3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5

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3.5x+x=0.97.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.53.5x+x=0.97.2(x-5)=1.443.5x+x=0.97.2(x-5)

3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5
3.5x+x=0.9 7.2(x-5)=1.44
3.5x+x=0.9
7.2(x-5)=1.44
2.5x+7.5=12.5

3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5
(1)4.5X=0.9
x=0.2
(2)7.2X-36=1.44
7.2x=37.44
X=5.2
(3)2.5x=5
x=2