一次方程式って聞くと難しそうだけど、実はつり合いの取れた天秤をイメージするだけで簡単に解けるんだ。xの値を見つける3つのステップをマスターすれば、テストでも自信を持って解答できるよ。
算数26 views·Updated May 21, 2026·1 page中学生向け一次方程式の解き方: 基本から応用まで
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一次方程式の解き方
君の周りにある謎解きパズルと同じで、一次方程式は隠れた数字xを見つけるゲームなんだ。「$2x+3=7$」みたいな式で、このxにどんな数が入るかを探すのが目標だよ。
等式の性質を理解するコツは、つり合いの取れた天秤を思い浮かべること。左の皿と右の皿が同じ重さなら、両方に同じものを足したり引いたりしても、つり合いは保たれるよね。
解き方は超シンプルで、たった3ステップ。移項でxと数字を左右に分ける→計算して簡単にする→係数で割るでxの値が出る。この順番さえ覚えれば、どんな一次方程式も怖くない！
重要ポイント: 移項するときは必ず符号を逆にする。が右に移るとになるよ。
実際に「$2x+3=72x=7-32x=4x=2$。これで完成だ！
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Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
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4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user
算数26 views·Updated May 21, 2026·1 page中学生向け一次方程式の解き方: 基本から応用まで
一次方程式って聞くと難しそうだけど、実はつり合いの取れた天秤をイメージするだけで簡単に解けるんだ。xの値を見つける3つのステップをマスターすれば、テストでも自信を持って解答できるよ。
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一次方程式の解き方
君の周りにある謎解きパズルと同じで、一次方程式は隠れた数字xを見つけるゲームなんだ。「$2x+3=7$」みたいな式で、このxにどんな数が入るかを探すのが目標だよ。
等式の性質を理解するコツは、つり合いの取れた天秤を思い浮かべること。左の皿と右の皿が同じ重さなら、両方に同じものを足したり引いたりしても、つり合いは保たれるよね。
解き方は超シンプルで、たった3ステップ。移項でxと数字を左右に分ける→計算して簡単にする→係数で割るでxの値が出る。この順番さえ覚えれば、どんな一次方程式も怖くない！
重要ポイント: 移項するときは必ず符号を逆にする。が右に移るとになるよ。
実際に「$2x+3=72x=7-32x=4x=2$。これで完成だ！
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in 算数
7Most popular content
9Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user