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10) \( \begin{aligned}-5 x+y & =-3 \\ 3 x-8 y & =24\end{aligned} \)

Ask by Daniels Adkins. in the United States
Feb 27,2025

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Answer

The solution is \( x=0 \) and \( y=-3 \).

Solution

Solve the system of equations \( -5x+y=-3;3x-8y=24 \). Solve the system of equations by following steps: - step0: Solve using the substitution method: \(\left\{ \begin{array}{l}-5x+y=-3\\3x-8y=24\end{array}\right.\) - step1: Solve the equation: \(\left\{ \begin{array}{l}y=-3+5x\\3x-8y=24\end{array}\right.\) - step2: Substitute the value of \(y:\) \(3x-8\left(-3+5x\right)=24\) - step3: Simplify: \(-37x+24=24\) - step4: Move the constant to the right side: \(-37x=24-24\) - step5: Subtract the terms: \(-37x=0\) - step6: Change the signs: \(37x=0\) - step7: Rewrite the expression: \(x=0\) - step8: Substitute the value of \(x:\) \(y=-3+5\times 0\) - step9: Substitute back: \(y=-3\) - step10: Calculate: \(\left\{ \begin{array}{l}x=0\\y=-3\end{array}\right.\) - step11: Check the solution: \(\left\{ \begin{array}{l}x=0\\y=-3\end{array}\right.\) - step12: Rewrite: \(\left(x,y\right) = \left(0,-3\right)\) The solution to the system of equations is \( (x,y) = (0,-3) \).

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To solve the system of equations \(-5x + y = -3\) and \(3x - 8y = 24\), we can use the substitution or elimination method. First, from the first equation, express \(y\) in terms of \(x\): \[ y = 5x - 3 \] Now, substitute \(y\) in the second equation: \[ 3x - 8(5x - 3) = 24 \] \[ 3x - 40x + 24 = 24 \] \[ -37x + 24 = 24 \] Subtracting 24 from both sides gives: \[ -37x = 0 \] Thus, \(x = 0\). Now, substitute \(x = 0\) back into the expression for \(y\): \[ y = 5(0) - 3 = -3 \] The solution to the system is \(x = 0\) and \(y = -3\) or as a point, \((0, -3)\). Pretty satisfying with those integer solutions, right? Now, on to the fun bits: It’s fascinating to see how equations can model real-world situations, like budgeting or distance-time problems, where finding the intersection (solution) helps decide crucial factors, such as the point where costs balance out or two travelers meet. Also, mistakes in algebra often happen with signs or misapplying formulas. Keep an eye on those negative signs and remember to double-check each substitution when you're juggling equations. It’s a classic trap many fall into!

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