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5(1-3x)-4x+9=2(x+2)-11=

Răspuns :

5(1-3x)-4x+9 = 2(x+2)-11

5-15x-4x+9 = 2x+4-11

-19x-2x = -7-9-5

-21x = -21

x = -21:(-21)

x = +1