Suggested: if 3x-7y=10 and xy=-1 find the value of 9x^2+49y^2 - find the value of k if the equation 2x2+xy-6y2+3x+y+1=0 - find the value of x+y if 3x-2y=5 and 3y-2x=3 - if 3x 7y=10 and xy= 1 find the Browse related:
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