Răspuns:
a) 2(x+2)-3(x-1)=5x+19
2x+4-3x+3=5x+19
-6x=12
x=-2
2(x+2) - 3(x-1) = 5x+19
2x+4 - 3x+3 = 5x+19
-x-5x = 19-7
-6x = 12
x = 12:(-6)
x = -2