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a fost răspuns

2( 3x-1) ( 2x+5)-5(2x+1) (x+2) -(x+4)(x-3)

Răspuns :

(6x-3)(2x+5)-(10×+5)(x+2)-(x+4)(x-3)=
=(12x-15)-(10x+10)-(x -12)
12×-10x-x=15-10+12
2x-x=5+12
×=17

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