====== 移項 (いこう、transpose) ======
対象年齢: 12 歳以上❓😅💦(中1)\\

===== 等式の性質 =====
<m 14>a=b</m>ならば...\\
  * <m 14>a+c=b+c</m>
  * <m 14>a-c=b-c</m>
  * <m 14>ac=bc</m>
  * <m 14>a/c=b/c</m>
上記の等式が成り立つ。\\

参考: [[wpjp>等式#算術|等式 - 算術 - Wikipedia]] より\\

===== 移項公式 =====
^ 符号を反転して移項  ^^
|<m 14>a - b = c</m>\\ <m 14>a - b (+ b) = c (+ b)</m>\\ <m 14>a = c + b</m>  |<m 14>a + b = c</m>\\ <m 14>a + b (- b) = c (- b)</m>\\ <m 14>a = c - b</m>  |
^ 分母を反転して移項  ^^
|<m 14>a / b = c</m>\\ <m 14>a / b (* b) = c (* b)</m>\\ <m 14>a = cb</m>  |<m 14>ab = c</m>\\ <m 14>ab / b = c / b</m>\\ <m 14>a = c / b</m>  |