SOLUTION: How many pounds of M&M selling for $2.00 per pound sould be mixed with 2 lb of Raisinettes selling for $3.00 per lb to obtain a mixture selling for $2.20 per lb?

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Question 831209: How many pounds of M&M selling for $2.00 per pound sould be mixed with 2 lb of Raisinettes selling for $3.00 per lb to obtain a mixture selling for $2.20 per lb?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = pounds of M&M's needed
+%28+2x+%2B+3%2A2+%29+%2F+%28+x+%2B+2+%29+=+2.2+
+2x+%2B+6+=+2.2%2A%28+x+%2B+2+%29+
+2x+%2B+6+=+2.2x+%2B+4.4+
+.2x+=+1.6+
+x+=+8+
8 pounds of M&M's are needed
check:
+%28+2x+%2B+3%2A2+%29+%2F+%28+x+%2B+2+%29+=+2.2+
+%28+2%2A8+%2B+3%2A2+%29+%2F+%28+8+%2B+2+%29+=+2.2+
+%28+16+%2B+6+%29+%2F+10+=+2.2+
+22+=+2.2%2A10+
+22+=+22+
OK