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x^2 + 49 = x^2 + 2x +1
0 = 2x -48
2x = 48
x = 24
x^2 + 7^2 = (x+1)^2
x^2 + 49 = x^2 + 2x +1
0 = 2x -48
2x = 48
x = 24