Please print your full name in capital letters. 48 Name: Lydea Loevirer 1. (40 points) Use either method to find the solution to the following system, \[ \left\{\begin{array}{l}3 x-7 y=13 \\ 6 x+5 y=7 .\end{array}\right. \] Graph the two equations and mark the solution on the graph. If no solution, state so.
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First, let's go through solving the system of equations step by step. 1. Start with the equations: \[ \left\{\begin{array}{l} 3x - 7y = 13 \\ 6x + 5y = 7 \end{array}\right. \] 2. We can use the substitution or elimination method. Here, we'll use the elimination method. 3. Multiply the first equation by 2 to align the coefficients of \(x\): \[ 6x - 14y = 26 \] 4. Now, rewrite the system: \[ \left\{\begin{array}{l} 6x - 14y = 26 \\ 6x + 5y = 7 \end{array}\right. \] 5. Subtract the second equation from the first: \[ (6x - 14y) - (6x + 5y) = 26 - 7 \] This simplifies to: \[ -19y = 19 \] Thus, \(y = -1\). 6. Substitute \(y = -1\) back into one of the original equations to find \(x\). Using the first equation: \[ 3x - 7(-1) = 13 \] Simplifies to: \[ 3x + 7 = 13 \implies 3x = 6 \implies x = 2 \] 7. The solution to the system is \((x, y) = (2, -1)\). To graph the equations, plot both lines on a graph. The intersection point, which is the solution \((2, -1)\), will be marked on the graph. If we were to analyze the graph of the two lines, they would intersect at this point, indicating that this system of equations has a unique solution: \((2, -1)\).
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