Algebra1
posted by jj .
a company sells brass and steel machine parts. One shipment contain 3 brass and 10 steel parts and cost 48.00. A second shipment contain 7 brass and 4 steel parts and cost 54.00. Find the cost of each type of machine part. How much would a shipment containing 10 brass and 13 steel machine parts cost?

Cost of brass part = x
Cost of steel part = y
2x + 10y = 48
7x + 4y = 54
solve for x and y
( I would multiply the first by 2, and the second by 5, then subtract them)