Answer:
x=b^2+d^2/a-c
Step-by-step explanation:
28/7=4. As a result, the constant of proportionality is 4. Hope it help!
Try to put all the x-es on one side and then find a value of one x. In this case:
x + 36 = 4x / -x (both sides)
36 = 3x / :3 (both sides)
x = 12
Let 'x' represent the amount of 50% mixture used, then '20-x' represents the amount of 10% mixture used
0.25(20) = 0.50x + 0.10(20-x)
solving for 'x' we have x=7.5
20-7.5 = 12.5
7.5 pounds of 50% mixture should be combined with 12.5 pounds of 10% mixture
