Question 92255
3C+G=175 OR G=175-3C
2C+4G=200 NOW SUBSTITUTE (175-3C) FOR G IN THIS EQUATION & SOLVE FOR C
2C+4(175-3C)=200
2C+700-12C=200
-10C=200-500
-10C=-500
C=-500/-10
C=50 COST OF THE CHOCOLATE BAR.
2*50+4G=200
100+4G=200
4G=200-100
4G=100
G=100/4
G=25 COST OF THE GUM.
PROOF
3*50+25=175
150+25=175
175=175