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BD結び、四角形ABDEの内角の和から、
∠CBD+∠CDB＝360°－(90°+61°+120°+33°)＝56°
よって∠x＝180°－56°＝124°
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![中学3年2次方程式の問題です。
問題文の[1つだけ整数の解をもつとき]と[2つの異なる整数... - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1808181/thumb_l_webp_17834198910490.webp?Expires=1783842040&Signature=LNIpotd5ZnOIS2SA8Q3w7qXTbigtb0UKdG4q5rtbL~oszz05DTTnmOHYc1yox-tH6SJqThdt52vN9-hOFHsdKvRAoxFksr12ZYnt5yC-4Ynf3vTfeXnSpTZ2kaNQr0YQOwI4SWbzmKjfleihE-G6hVfxCR1QAgBWhF40FrWFgM8uiDpj4-Z13SR7FV6Agv7iK3mFpodhHhNVqh9H8P7TtuSvrIJE4c8lxirpXvZkLwK0hIz~bp4zWqcXIoxisyACMAUSG7FFr-H3~ggXaiOONS6gccHxawI4C2ymOR0NAUy2uDKi7c3WOI38AfDqQzr2bp3E7LE19kMDuSPj5jHnxQ__&Key-Pair-Id=K2W722D70GJS8W&Expires=1783842040&Signature=Zb3rnRzELNw901ibAtWr2uUv~dMdzar68vZA4ykGtwLdcUTcqg~cxqQbd5INj~04h32ndQnha6sTliaQLVOZDa8HRq2BHRPHJGurDPO0EiqZFpyOrk-BQGLbeEnZUwsYWo6rGmYCaw6HKP8Q2OkacPm476bxdlLA2BLZAKoajTkNL2D869rzWUQnP5B0iGKfFqIjcmsekgDYeVxREFJhtJnirG7GO7UKij6UEr4mRJBbwMPmsjEW2UXKX8DU12TNXW4XZj8-ZsjtEN0IyGNHxEvW~vWXSzMTbwv~uut2Y4WMnCymUKuEF70Qt9kDtU4jgQMxA5hoPeFd-dKpQSDNow__&Key-Pair-Id=K2W722D70GJS8W)
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