Question

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) 3х+2y> 4а-2 и 5у – 3х2 >3 – 4а.​

Answer 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