Question 335451
.85X+.90*150=.87(150+X)
.85X+135=130.5+.87X
.85X-.87X=130.5-135
-.02X=-4.5
X=-4.5/-.02
X=225 POUNDS OF $.85 COFFEE IS USED.
PROOF:
.85*225+.90*150=.87(150+225)
191.25+135=.87*375
326.25=326.25