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a fost răspuns

Rezolvati ecuatiile:
a) 2{3(2x-1)-2[3(x+4)-2(x+6)]}=3[8-5(3x-2)]-7
b) 3{2(3x+2)-3[2(3x+5)-3(x+4)]}=5[4-3(2x-9)]-41

Răspuns :

a) 2[6x-3-2(3x+4-2x-12)]=3(8-15x+10)-7
2[6x-3-2(x-8)]=3(18-15x)-7
2(6x-3-2x+16)=54-45x-7
2(4x+13)=47-45x
8x+26=47-45x
8x+45x=47-26
53x=-21
x=-21÷53

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