Question

cel mai nr. natural sulutie a inecuatiei :
1supra 4 ×(x+19)≥42

Answer 1

$\frac{1}{4}(x+19) \geq 42 \\ x+19 \geq 42: \frac{1}{4}\\x+19 \geq 42*4\\x+19 \geq 168\\x \geq 168-19\\x \geq 149$
x∈[149, + infinit)