Ответ:
x= -3
Объяснение:
2*(1/7)^(3x+7) - 7 *(1/7)^(3x+8)=49
(1/7)^(3x+7) *(2 - 7*1/7)=7²
(1/7)^(3x+7) * 1=(1/7)^-2
3x+7= -2
3x= -9
x= -3
104 грибы!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!100%-правельный ответ!!!!!!!!!!!!!!!!!!!!!!!!!!!
<span>4n=-2+6n+7=n=-5/2
</span><span>8+3b=-7-2b=b=-3
</span>
x² - 16 - ax + 4a =
= (x² - 16) - (ax - 4a) =
= (x-4)(х+4) - а(x - 4) =
= (x-4)(х+4-а)