A town's economy consists of three industries, agriculture, manufacturing and gold mining. To grow one unit of food the agriculture industry needs...

z − d = 0

where the demand for gold is d, the output from manufacturing is y and the output from the mine is z. Hint: set the demand vector to d = (0, 0, d) and the output vector to x = (x, y, z) with x = 300

(d) Solve for y, z and d using a matrix inverse