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Need help on 2C plz HELP ME

Need help on 2C plz HELP ME-example-1

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2x + 2y = 14 \\ x = - 1 + 3y \\ \\ \\ 2 * ( - 1 + 3y) + 2y = 14 \\ x = - 1 + 3y \\ \\ \\ - 2 + 6y + 2y = 14 \\ x = - 1 + 3y \\ \\ \\ y = 2 \\ x = - 1 + 3(2) \\ \\ \\ y = 2 \\ x = 5
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