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Rezolvati:

×5+7= -3
7+34=5×


Răspuns :

5x+7=-3
5x=-10
x=-10/5
x=-2

7+34=5x
5x=41
x=41/5
X5+7=-3
x5=-10. /:5
z=-2

7+34=5x
41=5x
z=8,2