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5.(x+9)=135 ecuatie va rog acum

Răspuns :

Salut,



5(x + 9) = 135 sau 5·(x + 9) = 135 <=>

5x + 45 = 135 <=>

5x = 135 – 45 <=>

5x = 90 <=>

x = 90 : 5 <=>

x = 18 <=>

S = {18}