X = x/4 + 12
4x = x + 48
3x = 48
x = 16
3 1/20=3,05 2 3/50=2,06 4 8/25=4,32 7 11/20=7,55 12 4/25=12,16 9 13/50=9,26
7777/10000=0,7777 913/10000=0,0913 8 3/1000=8,003 5 17/1000=5,017
9 7/10000=9,0007 6 8/10000=6,0008
285+347=632
347+285=632
632-285=347
632-347=285
X^2 + 7 = (х + 7)^2х ^2 + 7 = х ^2 + 14х + 49 х ^2 + 7 - х ^2 - 14х - 49 = 0-14х +7 - 49 = 0-14х - 42 = 014х + 42 = 0 | :14х + 3 = 0<span>х = -3</span>
Ответ смотри во вложении••••••••••••••••••