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Cum se rezolva ecuatia: 7-4(x+1)=-2x+5(-x-3)?

Răspuns :

 7-4(x+1)=-2x+5(-x-3)
 7-4x-4=-2x-5x-15
3-4x=-7x-15
3x=-18
x=-6

7-4 ( x+1)=-2z+5(-x-3)
 aplicam distributivitatea 
7-4*x -4=-2x+5x-15
3-4x=-7x-15
3x=-18 
x=-18:3
x=-6