Ответ:
2) = ![\left \{ {{2x\geq 3} \atop {x\leq 3}} \right. = \left \{ {{x\geq 1,5} \atop {x\leq 3}} \right. \left \{ {{2x\geq 3} \atop {x\leq 3}} \right. = \left \{ {{x\geq 1,5} \atop {x\leq 3}} \right.](https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7B2x%5Cgeq%203%7D%20%5Catop%20%7Bx%5Cleq%203%7D%7D%20%5Cright.%20%3D%20%5Cleft%20%5C%7B%20%7B%7Bx%5Cgeq%201%2C5%7D%20%5Catop%20%7Bx%5Cleq%203%7D%7D%20%5Cright.)
Ответ: x ∈ [1,5 ; 3]
4) =
-5} \atop {x<12}} \right. = \left \{ {{x<1} \atop {x<12}} \right." alt="\left \{ {{-5x > -5} \atop {x<12}} \right. = \left \{ {{x<1} \atop {x<12}} \right." align="absmiddle" class="latex-formula">
Ответ: x ∈ [-∞ ; 1)
6) =
0} \atop {x\geq -7}} \right." alt="\left \{ {{x>0} \atop {x\geq -7}} \right." align="absmiddle" class="latex-formula">
Ответ: x ∈ (0 ; +∞)