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rezolvati ecuatia: : 7+3(2x+1)=10x+9

Răspuns :

 7+3(2x+1)=10x+9
x=10(2+1)=90
x=13-3x10=90

raspuns 90
7+3(2x+1)=10x+9
7+6x+3=10x+9
-4x=-1
x=1/4