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Find the value of x and y if ( 5x - 3y, 3x-y ) = ( 16,12 ) |
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Answer» Answer: Step-by-step explanation: 5x - 3y = 16 -------> eq 1. 3x - y = 12 multiply - 3 on both sides, - 9x + 3y = - 36 -------> eq 2. Add eq 1 and eq 2, 5x - 3y = 16 -9x +3y = -36 __________ -4x + 0 = -20 -4x = -20 x = - 20 / - 4 x = 5 SUBS in eq 1, 5x - 3y = 16 5 ( 5 ) - 3y = 16 25 - 3y = 16 - 3y = 16 - 25 - 3y = - 9 y = - 9 / - 3 y = 3 |
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