Question 735644
.90X+.40*30=.85(30+X)
.90X+12=25.50+.85X
.90X-.85X=25.50-12
.05X=13.50
X=13.50/.05
X=270 POUNDS OF CAHSEWS ARE USED.
PROOF:
.90*270+.40*30=.85(30+270)
243+12=.85*300
255=255