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Question Find the solution of the system of equations. \[ \begin{array}{r}10 x-2 y=44 \\ -2 x-9 y=10\end{array} \] Answer Attempt 1 out of 2 \( (\square \square, \square) \) Suls answer

Ask by Bright Bird. in the United States
Mar 10,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The solution to the system of equations is \( (4, -2) \).

Solution

**Step 1: Write Down the System** \[ \begin{aligned} 10x - 2y &= 44 \quad \text{(Equation 1)} \\ -2x - 9y &= 10 \quad \text{(Equation 2)} \end{aligned} \] **Step 2: Solve Equation 1 for \( y \)** Starting with Equation 1: \[ 10x - 2y = 44 \] Isolate \( y \): \[ -2y = 44 - 10x \] Divide by \(-2\): \[ y = \frac{10x - 44}{2} = 5x - 22 \] **Step 3: Substitute \( y = 5x - 22 \) in Equation 2** Substitute into Equation 2: \[ -2x - 9(5x - 22) = 10 \] Expand the term: \[ -2x - 45x + 198 = 10 \] Combine like terms: \[ -47x + 198 = 10 \] **Step 4: Solve for \( x \)** Subtract 198 from both sides: \[ -47x = 10 - 198 \] \[ -47x = -188 \] Divide by \(-47\): \[ x = \frac{-188}{-47} = 4 \] **Step 5: Substitute \( x = 4 \) into \( y = 5x - 22 \)** \[ y = 5(4) - 22 = 20 - 22 = -2 \] **Final Answer** \[ (4, -2) \]

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Mind Expander

To solve the system of equations, let's first simplify both equations. The first equation is \(10x - 2y = 44\), which simplifies to \(5x - y = 22\) when divided by 2. The second equation, \(-2x - 9y = 10\), can remain as it is for now. Now we can express \(y\) in terms of \(x\) from the first equation: \(y = 5x - 22\). Substituting this expression into the second equation gives us \(-2x - 9(5x - 22) = 10\). Solving this will lead us to the values of \(x\) and \(y\)! After performing the algebra, you will find that \(x = 2\) and substituting back to find \(y\) will yield \(y = -8\). So, the solution of the system is \( (2, -8) \).

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