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rezolvați ecuatia : 2(x+3)-5(2x+1)=12x-19 Vreau rezolvarea. . raspunsul trebuie să fie:1

Răspuns :

2(x+3)-5(2x+1)=12x-19
2x+6-10x-5=12x-19
-8x+1=12x-19
-8x-12x=-19-1
-20x=-20 /•(-1)
20x=20
x=20:20
x=1
2(x+3)-5(2x+1)=12x-19
2x+6-10x-5=12x-19
6-5+19=12x+10x-2x
20=20x
x=20:20
x=1