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2 (x+5)+(15-9>6 (2x+1)

Răspuns :

2x + 10 + 15 - 9 > 12x + 6 
16 - 6 > 12x - 2x 
10 > 10x 
x < 10 : 10 
x < 1 
2(x+5)+(15-9) > 6(2x+1)
2x+10+15-9 > 12x+6
2x+16 > 12x+6
2x-12x > 6-10
-10x > -10 /•(-1)
10x > 10
x > 10:10
x > 1

[tex] x \in {2~;~3~;4~;~\infty}[/tex]