Mathematics, 26.07.2019 04:30, marissarsmith8205

Me ! urgent needed! if 85c - 170a = 306, and 255a + 85b = 714, then what is the average of a, b and c?

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Me ! urgent needed! if 85c - 170a = 306, and 255a + 85b = 714, then what is the average of a, b a...

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