<span>первое
-3x= 3 1/7
-3х=22/7:(-3)
х= -1 1/21
второе
</span><span>3/4x=1/2
</span>х=1/2:3/4
х=2/3
~•~•~•ZLOY_TIGROVSKIY~•~•~•
(-1 8/9 - 3 1/6) * 8.64 = (-17/9-19/6)* 864/100= (-34/18-57/18)* 216/25 = - 91/18*216/25=-91*12/25=-1092/25 = -43 17/25
3 (у-1)^2+6у=3 (у^2-2у+1)+6у =3у^2-6у+3+6у=3у^2+3