Mathematics, 03.02.2021 01:00 hey840

In the triangle, x is 5 greater than y, and y is 21 less than three times z, and the perimeter is 180. What is the value of each variable? To find the answer, write a system of equations and use an inverse matrix to solve it. Please help, I don't understand.

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In the triangle, x is 5 greater than y, and y is 21 less than three times z, and the perimeter is 18...

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