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Calculati:
2•4+8x-3x=25


Răspuns :

8 + 5x = 25
5x = 25- 8 
5x = 17 
x = 17 supra 5    Sau 3.4
2*4+8x-3x=25
8+5x=25
5x=25-8
5x=17
x=17/5
x=3.4