Question 1165525
x at 7%
30-x at 15%
.07x+.15(30-x)=30*0.10=3 pounds pure fat
.07x+4.5-0.15x=3
-0.08x=-1.5
x=18.75 pounds of 7% (which is 1.3125 lb pure fat)]
30-x=11.25 pounds of 15% (which is 1.6875 lb pure fat)