If the value for three years is $3500 then the answer should be $7000. you would take 3500 and multiply it by 2 because 3 years plus 3 years is 6 years
1 1/2 blueberry jam went into each container
4(5)+4(3)+3(2)=$38 total cost =$38
Multiply both sides by 7.
-5 * 7 = c/7 * 7
-5 * 7 = c
c = -35
Your final answer is c = -35.