Question

5c+4p=18.40 2c+4p=11.20

Answer 1

Answer:

c = 2.4

p = 1.6

Step-by-step explanation:

Given:

5c+4p=18.40

2c+4p=11.20

-1(2c+4p=11.20)    <-- Distribute -1 so that you can cancel out p

-2c-4p=-11.20

    5c+4p=18.40

+  -2c-4p=-11.20      <-- Add/simplify like terms

    3c = 7.2              <-- Isolate c by dividing    

c = 2.4

Now that we have c, we can find p

5c+4p=18.40

5(2.4)+4p=18.40   <-- Sub in 2.4 for c

12+4p=18.40        <-- Combine like terms in one side

4p=6.4                 <-- Isolate p by dividing

p = 1.6