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Exercises 1–3 Determine the value of 𝑥 and 𝑦 in the following systems of equations.
Example
Determine the values for 𝑥, 𝑦, and 𝑧 in the following system:
2𝑥 +3𝑦 − 𝑧 = 5
4𝑥 −𝑦 − 𝑧 = −1
𝑥 +4𝑦 + 𝑧 = 12
Exercises 4–5
4. Given the system below, determine the values of 𝑟, 𝑠, and 𝑢 that satisfy all three equations.
𝑟 + 2𝑥 − 𝑢 = 8
𝑠 + 𝑢 = 4
𝑟 − 𝑠 − 𝑢 = 2
5. Find the equation of the form 𝑦 = 𝑎𝑥2 + 𝑏𝑥 + 𝑐 whose graph passes through the points (1, 6), (3, 20), and (−2, 15)
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