Числа кратны 6 значит d = 6
a1 = 6
a2 = a1+d = 12 и т.д.
150 кратно 6
an = a1+(n-1)d = 150
6 +n*d -6 = 150
n = 150/d = 25
s25 = (2a1+ d(n-1))*n/2 = (2*6 + 6*24)*25/2 = 1950
X=9-5y
3y-2(9-5y)=-5
3y-18+10y=-5
x=9-5y
y=1
x=4
1)х(у+5)+1(5+3)=(х+1)(х+5)
2)а(с-b)-1(c-b)=(a-1)(c-b)
3)a(b-c)-4(b-c)=(a-4)(b-c)
1) ( 24^16 - 5 )( 24^16 + 5 ) = ( 24^16 )^2 - 5^2 = 24^32 - 25
2) 6^32 * 4^32 = 24^32
3) 24^32 - 24^32 + 25 = 25
ОТВЕТ 25