(a-4b+7)/(4a-b+7)=8
(a-4b+7)=(4a-b+7)*8
a-4b+7=32a-8b+56
-4b+8b=32a-a+56-7
4b=31a+49
31a-4b+55=32a-31a-49+55=6
8 * 2^x/2^1 - 2^x >48
(8/2 - 1)* 2^x > 48
3* 2^x >48
2^x > 16
2^x > 2^4
x>4
Log2 x * log3 x = 4log3 2
ЗА X ВОЗЬМЁМ 2 = 3 В КВАДРАТЕ=6=3^2=-2+1