Question 131528
.06X+.02(16-X)=.03*16
.06+.32-.02X=.48
.04X=.48-.32
.04X=.16
X=.16/.04
X=4 LITERS OF 6% IRON IS USED.
16-4=12 LITERS OF 2% IRON IS USED.
PROOF.
.06*4+.02*12=.03*16
.24+.24=.48
.48=48