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2[15+3(x-1)]=4(x+7)
Plus rezolvare va roggg mult, e urgent.!!


Răspuns :

2[15+3(x-1)]=4(x+7)
2(15+3x-3)=4x+28
2(3x+12)=4x+28
6x+24=4x+28
6x-4x=28-24
2x=4
x=4:2
x=2
2(15+3x-3)=4x+28
2(12+3x)=4x+28
24+6x=4x+28
24-28=-6x+4x
-4=-2x
-2x=-4
x=-4/-2
x=2