13a+18a=31a;10(2m+n)=20m+10n;12(4x-3y)=48x-36y
(х - 2)^2 + (y - 3)<span>^2 = 5 x+2y=3
x+2y = 3 x-6=3
x=9
2x - 4 + 2y - 9 = 5
x+2y=3
2x + 2y = 18
x+2y=3
2х + 2y = 18
x=3-2y
2*(3-2y) = 18
6-4y = 18
-4y = 12
y=-3
Ответ: x=9, y=-3</span>
1)х/34=8050 (ост.12),х=8050*34+12=273712, проверка 273712/34=8050 (ост.12)
2)х/46=3080 (ост.35), х=3080*46+35= 141715, проверка 141715/46=3080 (ост.35)
50601-(76*507+102720:96)=
1)(38532+1070)=39602
2)50601-39602=10999