代入消去法解聯立方程式2 (英) | 聯立方程式與不等式| 均一 ...

代入消去法解聯立方程式2 We have this system of equations, y is equal to 4x minus 17.5, and y plus 2x is equal to 6.5. And we have to solve for x and y. So we're ...

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