1) 5>-8 и 8>5
5+8>-8+5
13>-3
2) -8<2 и 3<5
-8+3<2+5
-5<7
3) 3x+y=2x+1 и 3у–2x<14–2а
(3x+y)+(3y-2x)<(2x+1)+(14-2a)
x+4y<2x-2a+15
4) 3х+2y>4а-2 и 5у–3х>3–4а
(3x+2y)+(5y-3x)>(4a-2)+(3-4a)
7y>1
1) 5>-8 и 8>5
5+8>-8+5
13>-3
2) -8<2 и 3<5
-8+3<2+5
-5<7
3) 3x+y=2x+1 и 3у–2x<14–2а
(3x+y)+(3y-2x)<(2x+1)+(14-2a)
x+4y<2x-2a+15
4) 3х+2y>4а-2 и 5у–3х>3–4а
(3x+2y)+(5y-3x)>(4a-2)+(3-4a)
7y>1