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Paranteza mica 9 plus 2x paranteza inchisa 6 = 60 plus paranteza mica deschisa 7-4x paranteza inchisa plus 2


Răspuns :

(9+2x)6=60+(7-4x)+2
54+12x=60+14-8x
12x+8x=74-54
20x=20
x=1