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 nad the cost of a pack of gum.

3C + 1G= 1.75
2C + 4G=2.00

solve.

I know that i have to eliminate the c's or g's but what do i use to do that?

How do you solve when you have two problems together like this?

To solve the system of equations, you can use the method of elimination. In this case, let's eliminate the chocolate bars (C) by multiplying the first equation by 2 and the second equation by 3.

2*(3C + 1G) = 2*1.75 --> 6C + 2G = 3.50
3*(2C + 4G) = 3*2.00 --> 6C + 12G = 6.00

Now, subtract the second equation from the first equation to eliminate the C terms:

(6C + 2G) - (6C + 12G) = 3.50 - 6.00
-10G = -2.50

Divide both sides of the equation by -10 to solve for G:

G = -2.50 / -10
G = 0.25

Substitute the value of G back into one of the original equations, such as the first equation, to solve for C:

3C + 1(0.25) = 1.75
3C + 0.25 = 1.75
3C = 1.75 - 0.25
3C = 1.50
C = 1.50 / 3
C = 0.50

Therefore, the cost of a chocolate bar (C) is $0.50 and the cost of a pack of gum (G) is $0.25.

To solve the system of equations and find the cost of a chocolate bar (C) and the cost of a pack of gum (G), you can use the method of substitution or elimination. Let's solve it using the elimination method:

1) Multiply both sides of the first equation by 2 to eliminate the C's:
2 * (3C + 1G) = 2 * 1.75
6C + 2G = 3.50

2) Multiply both sides of the second equation by 3 to eliminate the C's:
3 * (2C + 4G) = 3 * 2.00
6C + 12G = 6.00

Now, you have two equations:
6C + 2G = 3.50
6C + 12G = 6.00

3) Subtract the first equation from the second equation to eliminate the C's:
(6C + 12G) - (6C + 2G) = 6.00 - 3.50
12G - 2G = 2.50
10G = 2.50
G = 2.50 / 10
G = 0.25

Now that you have the value of G, substitute it back into either of the original equations to solve for C. Let's use the first equation:

3C + 1(0.25) = 1.75
3C + 0.25 = 1.75
3C = 1.75 - 0.25
3C = 1.50
C = 1.50 / 3
C = 0.50

Therefore, the cost of a chocolate bar (C) is $0.50, and the cost of a pack of gum (G) is $0.25.