Question

Ajuda ai por favor. Preciso pra hoje .

Answer 1

Resposta:

Explicação passo-a-passo:

a)x/5-5/3+x<-1   mmc= 5x3=15

3x/15-25/15+15x/15<-15/15

3x-25+15x<-15

18x<-15+25

x<10/18 (÷2)

x< 5/9

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b)x-1/2>1+x/3     mmc= 2x3=6

3(x-1)/6>6.1/6+2.x/6

3x-3>6+2x

3x-2x>6+3

x>9

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c)x/5>1/4-2-x/2   mmc= 5,4,2 :2= 5,2,1:2= 5,1,1:5 =1, 1, 1, = 2x2x5=20

4x/20> 5/20-10(2-x)/20

4x>5-20+10x

4x-10x> -15

-6x> -15  (-1)

6x<15

x<15/6 (÷3)

x<5/2

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d)x+1/4≤ x-2/8         mmc= 4,8:2= 2,4:2= 1,2:2 = 1,1 = 2x2x2=8

2(x+1)/8≤x-2/8

2x+2≤x-2

2x-x≤-2-2

x≤ -4

---------------------------------

e) x/2>2(1-x)   mmc=2

x/2>4(1-x)/2

x>4-4x

x+4x>4

5x>4

x>4/5

-------------------------------

f)x-1/4>-1/6+x-2/3  mmc= 3,4,6:2= 3,2,3:2= 3,1,3:3= 1,1,1 = 2x2x3= 12

3(x-1)/12>2.-1/12+4(x-2)/12

3x-3>-2+4x-8

3x-4x>-2-8+3

-x>-7 (-1)

x<7