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0.6+p4.5=22.5
We move all terms to the left:
0.6+p4.5-(22.5)=0
We add all the numbers together, and all the variables
p4.5-21.9=0
We move all terms containing p to the left, all other terms to the right
p4.5=21.9
p=21.9/1
p=21.9
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