Question

@korie.

Answer 1

Let:
t = pounds of 12% protein meal
s = pounds of 6% protein meal

You want 240 pounds total, so:

t + s = 240

And the amount of meal (12% of one kind, and 6% of the other) must be 7% of the 240, you're adding two amounts of protein to make a total sum of protein:

0.12t + 0.06s = 0.07(240)
0.12t + 0.06s = 16.8

You now have a system of equations with two unknowns and two formulas. Solve with substitution:

t + s = 240
t = 240 - s

0.12t + 0.06s = 16.8
0.12(240 - s) + 0.06s = 16.8
28.8 - 0.12s + 0.06s = 16.8
-0.06s = -12
s = 200

t = 240 - s
t = 240 - 200
t = 40

You need 200 pounds of 6% protein meal and 40 pounds of 12% protein meal to get 240 pounds of 7% protein meal.

Answer 2

yup i got that too