Mathematics
Senior High

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(3) |x|+|x-31=5

Answers

x<0、0≦x<3、x≧3 で場合分け

x<0なら両方の絶対値の中が負だから…
0≦x<3ならxの方が正、x-3の方が負だから…
x≧3なら両方の絶対値の中が正だから…

Kurage

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