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-3.45+0.5p=-1.2
We move all terms to the left:
-3.45+0.5p-(-1.2)=0
We add all the numbers together, and all the variables
0.5p-2.25=0
We move all terms containing p to the left, all other terms to the right
0.5p=2.25
p=2.25/0.5
p=4+0.25/0.5
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