<PRE><B>Question 125689</B>
Chocolate Bars = x Packs of Gum = y
 
3x + 1y = 1.75
2x + 4y = 2.00 

This can be solved with using Substitution Method. 

Expressing x as a function of y (from the first equation) 
x = (1.75 -y)/3

Substituting this expression into the second equation:
x = (1.75 -y)/3

Simplifying this expression:
10y = 2.5

or
y = 0.25

Now, substituting y = 0.25 back into the x expressed as a function of y:
x = (1.75-y)/3
x = 1.75 - .25
x = 1.50/3
x = .5  

x = 0.50 y = 0.25

3 * .50 + 1 * .25 = 1.75
1.5 + 0.25 = 1.75
1.75 = 1.75

2 * .50 + 4 * .25 = 2.00
1 + 1 = 2
2 = 2

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