Mathematics
Senior High
見ずらくてすみません😢⤵️⤵️少し大変かも知れませんが、この問題がわからないので教えてください
78
(2) 2|x+1|-|x-3|≦2x+1
[1]x<0のとき
1x+11=-x-11x
2x-2+x-3≦2
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