Firstly we are looking for two variables x,y so that we need two formulas .
the second formula is missing
I would assume that you convert 2.5 ounces into punds which would make it 0.15 lbs.
N*(21/100)=(700/100)
n=(700/100)/(21/100)
n=(700/100)*(100/21)
n=700/21
n=33+1/3
So <em><u>thirty three</u></em> $0.21 pencils can be purchased for $7.00.
Measurements of 30 I believe yw
