Question 273766
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Substitute the value 4 for *[tex \Large y] in your equation.  Then solve for the resulting value of *[tex \Large x].  That is because if *[tex \Large \left(x_1,y_1\right)] is a solution of *[tex \Large Ax\ +\ By\ =\ C], then *[tex \Large Ax_1\ +\ By_1\ =\ C] must be a true statement.



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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