Question 161533
.70*12+.45x=.55(12+x)
8.4+.45x=6.6+.55x
.45x-.55x=6.6-8.4
.1x=1.8
x=1.8/.1
x=18 pounds of the $.45 pasta is needed.
Proof:
.70*12+.45*18=.55(12+18)
8.4+8.1=.55*30
16.5=16.5