SOLUTION: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the

Question 69339: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the cost of a pack of gum.
Please help solve
Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
3c+g=175
2c+4g=200 now multipy the first equation by -4 & add thus
-12c-4g=-700
-------------------------------------
-10c=-500
c=-500/-10
c=50 cost of 1 chocolate bar. now substitute 50 for c & solve for g.
3*50+g=175
150+g=175
g=175-150
g=25 cost of 1 pack of gum.
proof
2*50+4*25=200
100+100=200
200=200
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