1)3х-1=2(х-2) 3х-1=2х-4 3х-2х=1-4 х= -32)3(х+5)=7-5х 3х+15=7- 5х 3х+5х= -15+7 8х= -8 х= -13)19(у-9)=3(у+7) 19у-171=3у+21 16у=192 у=124)4(х-9)=3(х-8) 4х-36=3х-24 х=125)3(2х-9)=5(х-4) 6х-27=5х-20 х=76)7(3-2х)=15(1-х) 21-14х=15-15х<span> х=-6</span>
<span>( a-b)^2-2ab+2a^2-b^2=a(3a-4b)
a</span>²-2ab+b²-2ab+2a²-b²=3a²-4ab = a(3a-4b)
1. 8 12/13+1 11/13=9 23/13=10 10/13
2.8 15/23+2 14/23=10 29/23=11 6/23
3. 1) 17/25+19/25=36/25=1 11/25-длина
2) (17/25+1 11/25)x2=2 3/25x2=4 6/25-периметр
4). 9 3/19-(34/19+х)=2 5/19
3 4/19+х=9 3/19-2 5/19
3 4/19+х=6 17/19
Х=6 17/19-3 4/19
Х=6 13/19
5)от 0 до 8
<span>64 : х + 96 = 104
</span><span>64 : х = 104-96
</span><span>64 : х =8
</span>х=64:8
х=8
-13; -12; -11; -10; -9; -8; -7; -6; -5; -4; -3; -2; -1; 0; 1; 2; 3; 4