Question 269791
.60X+.20*2=.35(X+2)
.60X+.40=.35X+.70
.60X-35X=.7-.4
.25X=.3
X=.3/.25
X=1.2 G. OF 60% SILVER IS USED.
PROOF:
.60*1.2+.2*2=.35(1.2+2)
.72+.4=.35*3.2
1.12=1.12