Question 150947
20R+10P=16.20 MULTIPLY THIS EQUATION BY -1.5 & ADD.
30R+12P=23.04
-30R-15P=-24.30
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-3P=-1.26
P=-1.26/-3
P=.42 PRICE OF A LB. OF POTATOES.
20R+10*.42=16.20
20R+4.20=16.20
20R=16.20-4.20
20R=12
R=12/20
R=.60 PRICE OF A LB. OF RICE.
PROOF:
30*.60+12*.42=23.04
18+5.04=23.04
23.04=23.04