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a fost răspuns

14. b) 8(x+1) -4(x-3) -x=2(x+18)
c) 4x+12- 3(x+4)= 2(x+5)
d) 5x + 16 -4(x+4)=2(x+9)
e) 4(x+5) +3(x+3)=2(x+15)+4
15. Rezolvati in Q ecuatiile:
b) 3[8-5(3x-2)] +4(4x-9) =2[3(2x-5)+28]-49
c) 2[7(2x-1) -3(4x-1)]=3[5(3x+2)-1]- (19x+13)

Răspuns :

b). 8(x+1)-4(x-3)-x=2(x+18) 8x+8-4x+12-x=2x+36 8x-4x-x-2x=36-12-8 x=16 c). 4x+12-3(x+4)=2(x+4) 4x+12-3x-12=2x+8 4x-3x-2x=8 -x=8 d). 5x+16-4(x+4)=2(x+9) 5x+16-4x-16=2x+18 6x-4x-2x=18 x=18 e). 4(x+5)+3(x+3)=2(x+15)+4 4x+20+3x+9=2x+30+4 4x+3x-2x=-20-9+30+4 5x=45 x=9

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