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rezolvati exercitiul-5(x-7)=3(x-4)-13=?


Răspuns :

5x-35=3x-12-13
5x-3x=-12-13+35
2x=10
x=10:2
x=5
-5(x-7)=3(x-4)-13
-x+35=3x-12-13
-x-3x=-12-13-35
-3x=-60
x=60/3
x=20