Question

rezolva inecuatia cu necunoscuta numar intreg

$1. \: \: \: - 2(x + 3) \leqslant 8$
$2. \: \: \: \: \: 2x + x - 3 > 12$

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Answer 1

$1. -2(x+3)\leq 8 /: (-2)\\\\x+3\leq -4 /-3\\x\leq -7$ => x∈[- infinit, -7]

$2. 2x+x-3>12/+3 \\3x> 15\\x> 5$

=> x∈(5, + infinit)