Question

va rog repede trebuie sa faceți doar b,c,d,E dau coroana​

Answer 1

b) 3x+3> sau = cu 9

3x>=9-3 |:3

x>=3-1

x>=2

=>x={2,1,0,-1,-2,-3,-4,-5,-6........}

c)5x+8*5< sau = cu 10. |:5

x+8=< 5

x= sau < 5-8

x=< -3

x={-3,-4,-5,-6,-7,-8......}

d)-2x -(-5)>4

-2x+5>4

-2x>4-5

-2x>-1. |*(-2)

2x>1

x={1,3,5,7,9,.........}

e) 3x+7>4

3x>4+7

3x>11

x={12,15,18,21,24,27,30.......}