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OpenStudy (anonymous):
Find the solutions to the nonlinear equations y=4x x^2+y^2=68
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OpenStudy (anonymous):
substitute y=4x to x^2+y^2=68 x^2+(4x)^2=68 x^2 + 16x^2 = 68 17x^2 = 68 x^2 = 4 x=+2 or -2
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