Question

Rezolvați sistemul de inecuatii
$7x + 6 \geqslant 5x + 12 \\ 3x - 18 < 4 - 20$
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Answer 1

7x+6 >\ 5x+12

7x-5x >\ 12-6

2x>\ 6

x>\ 3

x apartine [3, infinit)

3x-18<4-20 (cred ca ai uitat un x in partea dreapta)

3x-18< -16

3x< -16+18

3x< 2

x<2\3

x apartine (-infinit, 2/3)