196. Сложите неравенства:
1) 5>-8 и 8 >5;
2) -8<2 и 3<5;
3) 3x+y<2x+1 и 3у-2x< 14-2а;
4) 3х²+2y> 4а-2 и 5у – 3х² > 3 – 4а.
1) 5>-8 и 8 >5;
2) -8<2 и 3<5;
3) 3x+y<2x+1 и 3у-2x< 14-2а;
4) 3х²+2y> 4а-2 и 5у – 3х² > 3 – 4а.
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Answers & Comments
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