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5(x+3)=27+23 ; 3x+3+2(x+5)=23 ; 7x+3(x+2)=16 ; 11+14=3 (x-1)+16 ; 13(x-2)-2x=7 (x+4200):80=81




Răspuns :

5(x+3)=27+ 23
5X+15=27+23
5X=50
x=50: 5
x= 10