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15. Solve the following pairs of equations3x+y + 3x-y = 4 and 2(3x + y)ä¸2(3x-y) =-8 |
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Answer» 1/(3x+y) + 1/(3x-y)=3/4....(1) 1/2(3x+y) + 1/2(3x-y)=1/81/(3x+y) + 1/(3x-y)=1/4....(2) Subtract 1 from 2 Slope same, Parallel linesno solution |
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