Ответ:

a) 16 · a = 16 : a

16a = 16/a

a = 1/a

a2 = 1

a = 1, a = -1

б) t · t = t + t

t2 = 2t

t2 - 2t = 0

t(t - 2) = 0

t = 0, t = 2

в) y : 10 = y · 10

y/10 = 10y

y = 100y

100y - y = 0

99y = 0

y = 0

Ответ: а) 1, -1; б) 0, 2; в) 0