3 x - 6 y = 24 3 x - 5 y = 15 - 3 x - 6 y = 24 ______________ 3 x - 3 x - 5 y - ( - 6 y ) = 15 - 24 0 - 5 y + 6 y = - 9 y = - 9 x - 2 y = 8 x - 2 * ( - 9 ) = 8 x + 18 = 8 Subtract 18 to both sides x + 18 - 18 = 8 - 18 x = - 10 x = - 10 . y = - 9
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