Mathematics
Junior High
Solved

なぜ①-②が11(xー3)ー8(yー0)=0になるのでしょうか?

11z-8y= 1…の 11 × 3-8×4= 1…② が成り立つ。D-②より, 11 (z-3) -8(yー4) = 0 :: 11 (z-3) =D 8(y-4)

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