Question

resolva as inequaçoes: a) 2x+5>12 ,b)x+9 menor ou igual -2x+3,c)2(x-5)-3 maior igual 6x+2 ,d)x+5 maior igual 13 e)2x-3>3x-9

Answer 1

a)2x>12-5
2x>7
x>7/2

b)x+9≤-2x+3
x+2x≤3-9
3x≤-6
x≤-6/3
x≤-2

c)2(x-5)≥6x+2
2x-10≥6x+2
2x-6x≥2+10
-4x≥12
-x≥12/4
-x≥3  .(-1)
x≤-3

d)x+5≥13
x≥13-5
x≥8

e)2x-3>3x-9
2x-3x>-9+3
-x>-6 .(-1)
x<6