DevilutzZa13ask
a fost răspuns

Rezolvati ecuatiile, x ∈ Z :
a) 3x+5-2(x+2)=8-3(1-x)
b) 15-4(3x-8)=-1
Va rog, repede !

Răspuns :

AbbeyWhingask
a) 3x+5-2(x+2)=8-3(1-x)
3x+5-2x-4=8-3+3x
x-1=5+3x
x-3x=5+1
-2x=6
x=-3
b) 15-4(3x-8)=-1
15-12x+32=-1
15-12x=-1-32
15-12x=-33
12x=15-(-33)
12x=15+33
12x=48
x=4