(10х-3у-2ху+15) / (4х^2+4х-3)=(5(2х+3)-у(3+2х)) / ((4х^2+6х-2х-3)=
<span>1)4^(x+1)=64^(x-1)</span>
<span>нет решений</span>
<span>2)<span>2^(x+3)-2^(x+1)=12</span></span>
2^(х+3)-2^(х+1)=3*2^(х+1)
3*2^(х+1)=2^2*3
2^(х+3)-2^(х+1)-12=0
x=1