Question

Resolva as Inequaçoes do 1 grau

a)9X - 2 > 4X + 28
b)12X + 10 < 10 + 70
c)7 (X+2) > 2 (X+10)
d)10 (X+3) < 5 (X+2)​

Answer 1

a) 9x-2> 4x+28

9x-4x> 28+2

5x>30

x>30/5

x> 6

b) 12x+10<10+70

12x<10+70+10

12x<90

x< 90/12

x< 7,5

C) 7 (x+2)> 2(x+10)

7x+14> 2x+20

7x-2x> 20-14

5x> 6

x> 6/5

x> 1,2

d) 10 (X+3) < 5 (X+2)

10x+ 30< 5x+ 10

10x-5x<10 -30

5x< -20

x< -20/5

x< -4