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Mathematics, 02.09.2021 14:00 antcobra

A sum of RM 5000 is to be invested in three investments at an interest rate of 6%, 7% and 8% per annum respectively. The total annual income is RM 358. Let x, y and : represent the sum invested at the rate of interest of 6%, 7% and 8% per annum respectively. If the combined income from the first two investments is RM 70 more than the income from the third, find the amount of each investment by using the inverse matrix method.​

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