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Simultaneous equations: x/3 -y/4 = 0 and x/2 +3y/10 = 27/5

Multiply all terms in the 1st by 12 and in the 2nd equation by 10

So: 4x -3y = 0 and 5x +3y = 54

Add both equations together: 9x = 54 => x = 6

Solutions by substitution: x = 6 and y = 8

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