Объяснение:
{(7х+1)/2 - 2≥5х •2
{(х+5)(х+3)≥(х+1)(х+2)-2
{7х+1-4≥10х
{х²+3х+5х+15≥х²+2х+х+2-2
{7х-3≥10х
{8х+15≥3х
{7х-10х≥3
{8х-3х≥ -15
{ -3х≥3
{5х≥ -15
{х≤3:(-3)
{х≥ -15:5
{х≤ -1
{х≥ -3
х∈[-3; -1]
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Объяснение:
{(7х+1)/2 - 2≥5х •2
{(х+5)(х+3)≥(х+1)(х+2)-2
{7х+1-4≥10х
{х²+3х+5х+15≥х²+2х+х+2-2
{7х-3≥10х
{8х+15≥3х
{7х-10х≥3
{8х-3х≥ -15
{ -3х≥3
{5х≥ -15
{х≤3:(-3)
{х≥ -15:5
{х≤ -1
{х≥ -3
х∈[-3; -1]