помогите по математике1) - 3 < 1 + 2х < 4 2 ) 1 < _ 3-х < _ 5 3 ) -7 <2Х-5<_1

1) -3<1+2x<4<br>-4<2x<3<br>-22) $1 \leq 3-x \leq 5 -2 \leq -x \leq 2 2 \geq x \geq -2$
3) -7<2x-5<img src="https://tex.z-dn.net/?f=+%5Cleq+1" id="TexFormula2" title=" \leq 1" alt=" \leq 1" align="absmiddle" class="latex-formula">
-2<2x<img src="https://tex.z-dn.net/?f=+%5Cleq+6" id="TexFormula3" title=" \leq 6" alt=" \leq 6" align="absmiddle" class="latex-formula">
-1