Problema Solution
Two gallons of paint that costs $21 per gallon is mixed with one gallon of primer that costs $12 per gallon. What is the new cost per gallon of the mixed paint?
Answer provided by our tutors
the cost for 2 gallons of pain is 2*21 = $42
the cost of 1 gallon if primer is $12
the total cost of (2 + 1) gallons mixed pain is $(42 + 12) that is
3 gallons of mixed pain cost $64
let x be the cost per gallon of the mixed paint thus
x*3 = 64
x = 64/3
x = $21.33
the new cost per gallon of the mixed paint is $21.33.