3х+4=2/3х-2
3х-2/3х=-2-4
7/3х=-6
х=-6:7/3
х=-6*3/7
х=-18/7
Ответ:
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Х² + 11 = (х - 1)²
х² + 11 = х² - 2х + 1
11 = -2х + 1
2х = 1 - 11
2х = - 10
х = -5
3s+1+2s+4s+2s+1+2s+5+5s+4=3s+4s+2s+2s+2s+5s+1+1+5+4=7s+6s+5s+2+9=18s+11