\( \left. \begin{array} { l l } { x = 5 } & { 4 x - 4 y = 12 } \\ { x = 7 } & { 3 x + 5 y = 25 } \end{array} \right. \)
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Let's have some fun solving these simultaneous equations step by step! First, for the equation \(4x - 4y = 12\) when \(x = 5\): Substituting \(x = 5\) gives us: \[ 4(5) - 4y = 12 \] \[ 20 - 4y = 12 \] Now, solving for \(y\): \[ -4y = 12 - 20 \] \[ -4y = -8 \] \[ y = 2 \] So the first solution set is \((5, 2)\). Now, for the equation \(3x + 5y = 25\) when \(x = 7\): Substituting \(x = 7\) gives: \[ 3(7) + 5y = 25 \] \[ 21 + 5y = 25 \] Now, solving for \(y\): \[ 5y = 25 - 21 \] \[ 5y = 4 \] \[ y = \frac{4}{5} \] Thus, the second solution set is \((7, \frac{4}{5})\). You got two pairs of solutions! How cool is that?