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0.1p+2.1=4.6p-1.9+0.5p
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combine like terms on left side 4.6p+.5p=5.1p
.1p+2.1=5.1p-1.9
subract .1p from both sides .1p-.1p+2.1=5.1p-.1p-1.9
2.1=5p-1.9
add 1.9 to both sides 2.1+1.9=5p-1.9+1.9
4=5p
divide both sides by 5; 4/5=(5p)/5
.8=p or p= 4/5
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