60x-(40x-120)等于多少
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60x-(40x-120)等于多少60x-(40x-120)等于多少60x-(40x-120)等于多少20x+12060x-(40x-120)=60x-40x+120=20x+120望采纳-20X
60x-(40x-120)等于多少
60x-(40x-120)等于多少
60x-(40x-120)等于多少
20x+120
60x-(40x-120)
=60x-40x+120
=20x+120
望采纳
-20X