Math Is Fun Forum

hi, can any kind person help me out this 2 word problems??? thanks in advance

Set up appropriate systems of two linear equations in two unknowns and then solve the systems by determinants. all numbers are accurate to at least two significant digits.

(A)  A shipment of 320 cell phones and radar detectors was destroyed due to a truck accident. on the insurance claim, the shipper stated that each phone was worth $110, each detector was worth $160, and their total value was $40700. how many of each were in the shipment?

(B)A machinery sales representative receives a fixed salary plus a sales commission each month. if $6200 is earned on sales of $70000 in one month and $4700 is earned on sales of $45000 in the following month, what are the fiexed salary and the commission percent?