Problema Solution
a grocer mixed 2 varieties of tea, 1 costs $3 per kg and another costs $4 per kg. how many kgs of tea that cost $3 per kg should be used to make 30 kg of a blend that costs $3.40 per kg?
Answer provided by our tutors
Let x = number of kg of the $3 tea
3x + 4(30-x) = 3.40(30)
3x + 120 - 4x = 102
-x + 120 = 102
-x = -18
x = 18
Therefore, he should use 18 pounds of the $3 tea.