Solve the system of equations 3x = 84 - 2y 9x = 8y - 24

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asked Nov 10, 2022 16.4k views

1 vote

Solve the system of equations 3x = 84 - 2y 9x = 8y - 24

Mathematics
high-school

JLagana asked

by JLagana

4.9k points

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1 Answer

6 votes

Answer:

$3x = 84 - 2y - - - (i) \\ 9x = 8y - 24 - - - - (ii) \\ from \: (ii) \\ 3(3x) = 8y - 24 \\ but \: from \: (i) \: \: 3x = 84 - 2y \\ hence \: put \: (i) \: in \: (ii) \\ 3(84 - 2y) = 8y - 24 \\ 252 - 6y = 8y - 24 \\ 276 = 14y \\ y = (138)/(7) \\ x = (104)/(7)$