Question 1070179
42% is half way between the two percentages, so use 3.5 cups of each.
one can say x cups of 47%
7-x cups of 37%
.47(x)+(7-x)(.37)=7(.42)=2.94
.47x+2.59-.37x=2.94
.10x=0.35
x=3.5 cups