Question 56767
3C+G=150
2C+4G=200 NOW MULTIPLY EQ #1 BY -4 & ADD THE 2 EQ.
-12C-4G=-600
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-10C=-400
C=-400/-10
C=40 OR $.40 FOR THE CANDY BAR.
3*40+G=150
120+G=150
G=150-120
G=30 OR $.30 FOR THE GUM.
PROOF
2*40+4*30=200
80+120=200
200=200