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If you mean: x -y = 0 and 7x -3y = 24 then they are simultaneous equations whose solutions are x = 6 and y = 6
You find two numbers whose sum is -7 and product is +10. x2 - 7x + 10 = (x - 2)*(x - 5)
-7x + 5 = -9 -7x = -14 7x = 14 x = 2
3/7x + 5 = 87x(3/7x + 5) = 8(7x)3(7x/7x) + (7x)(5) = 8(7x)3 + 35x = 56x3 + 35x - 35x = 56x - 35x3 = 21x3/21 = 21x/211/7 = x
4x-7x = -3