Q. Solve the system of equations.−2x+9y=11−5x+2y=−34x=□y=□
Write Equations: Write down the system of equations.The system of equations is given by:−2x+9y=11−5x+2y=−34We will use the method of substitution or elimination to solve for x and y.
Multiply Equations: Multiply the first equation by 5 and the second equation by 2 to make the coefficients of x in both equations equal in magnitude.Multiplying the first equation by 5:−2x×5+9y×5=11×5−10x+45y=55Multiplying the second equation by 2:−5x×2+2y×2=−34×2−10x+4y=−68
Add Equations: Add the two new equations together to eliminate x. Adding the equations −10x+45y=55 and −10x+4y=−68: (−10x+45y)+(−10x+4y)=55+(−68)−20x+49y=−13 This step is incorrect because we should have subtracted one equation from the other to eliminate x, not added them together.
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