I need help with a math question please?

I need help with a math question please?
Solve the system algebriacally:
A company makes three types patio furniture: chairs, rockers, and chaise lounges. Each requires wood, plastic, aluminum, in the amounts shown in the following table. The company has in stock 400 unites of wood, 600 units of plastic, and 1500 units of aluminum. For its end of the season production run, the company wants to use up all the stock. To do this, how many chairs ,rockers, and chaise lounges should it make?
Chairs: Wood (1 unit) Plastic (1) Aluminum (2)
Rocker: Wood (1) Plastic (1) aluminum (3)
Chaise Lounge: wood (1) plastic (2) aluminum (5)
Any help would be appreciated
Best answer:
Answer by crazydave
chairs, 100
rockers, 100
chaise lounge, 200
didn’t use a formula, just trial and error
Know better? Leave your own answer in the comments!
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HINT: you need to set up equations for each of the products
(e.g., C = 1w + 1p + 2a)
You know that C + R + L (chairs + rockers + lounges) = 400, because each one takes one unit of wood, and there are only 400 units of wood.
Can you take it from here?