(-11)*(-10)*(-9)*(-8)*(-7)*(-6)*(-5)*(-4)*(-3)*(-2)*(-1)*(1)*(2)*(3)*(4)*(5)*(6)*(7)*(8)*(9)*(10)*(11)*(12)*(13) ну и посчитай
3x + y = 1
(x + 1)/3 - y/5 = 2 /*15
3x + y = 1
5(x + 1) - 3y = 30
3x + y = 1
5x + 5 - 3y = 30
3x + y = 1 /*3
5x - 3y = 25
9x + 3y = 3
5x - 3y = 25
-------------------- +
14x = 28
x = 2
y = 1 - 3x = 1 - 3*2 = 1 - 6 = - 5
Ответ
( 2 ; - 5)
0.00942*10^5=942 вроде так