4x - y &= 5

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• Substitute: \(d = \frac{1}{2} \times 4 \times (10)^2 = 200 \, \text{m}\).
• #### 200 m
• 2x + 3y &= 6 \\
• Substitute into the first equation: \(2x + 3(4x - 5) = 6\).
• Simplify: \(2x + 12x - 15 = 6\), so \(14x = 21\).
• Solve: \(x = 1.5\).

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