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rezolv:-2,5x+6=o
12-x\6+1=o


Răspuns :

2,5x+6=0 / -6 => 2,5x= -6 /:2,5 => x= -2,4 
12-x:6+1=0/-1
12-x:6=-1/ *6
12-x=-6/-12
-x=-18 <=> x=18

1) -2,5x+6=0
-2,5x=-6 / : (-2,5)
x=+2,4
2) 12-x:6+1=0
12-x:7=0
-x:7=-12/·(-7)
x=+84

             Sper ca ti-am fost de ajutor! :d