3.291 Найдите корень уравнения: a) 6x + 2x + 97 = 1561; б) 344t-137-2861 = 10 387; B) 3y + 6y + 78 = 1617; г) 345m - 236m - 1972 = 63 755.

a) 6x + 2x + 97 = 1561

8x + 97 = 1561

8x = 1561 - 97

8x = 1464

x = 1464 : 8

x = 183

б) 344t - 137 - 2861 = 10387

344t - 2998 = 10387

344t = 10387 + 2998

344t = 13385

t = 13385 : 344

t = 39

в) 3y + 6y + 78 = 1617

9y + 78 = 1617

9y = 1617 - 78

9y = 1539

y = 1539 : 9

y = 171

г) 345m - 236m - 1972 = 63755

109m - 1972 = 63755

109m = 63755 + 1972

109m = 65727

m = 65727 : 109

m = 603

Ответ: a) x = 183; б) t = 39; B) y = 171; г) m = 603