Stonewall receives ¢250 per year in simple interest from an amount of money he invested in ADB, Barclays and GCB. Suppose ADB pays an interest of 2%, Barclays pays an interest of 4% and GCB pays an interest of 5% per annum and an amount of ¢350 more was invested in Barclays than the amount invested in ADB and GCB combined. Also, the amount invested in Barclays is 2 times the amount invested in GCB.
a) Write down the three linear equations and represent them in the matrix form = .
b) Find the amount of money Stonewall invested in ADB, Barclays and GCB using Matrix
Inversion
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