Question

ME AJUDEM POR FAVORRRRRRRRRRRRRR NO PASSO A PASSO
2) Resolvendo inequações,
a) 7x - 3 <2 .(3x + 5)
b) 5x-9 > 2x+12
c) - 4x > 20
d) 5 - 3. (x+8) <x - 11​

Answer 1

Resposta:

a)x<13

b) x>7

c) x> -5

d) x>-2

Explicação passo-a-passo:

a) 7x -3 < 6x +10 (=) 7x - 6x < 10+3 (=) x<13

b) 5x -2x > 12+9 (=) 3x > 21 (=) x> 21÷3 (=) x> 7

c) x>20÷(-4) (=) x> -5

d) 5 -3x - 24 < x-11 (=) 5 -24 +11 < x +3x (=) -8 < 4x (=) x>-2

Answer 2

Resposta:

A) x<13

B) x>7

C) x>5

D)x < - 8

Explicação passo-a-passo:

A) 7x - 3<2.(3x +5)

7x - 3 <6x 10

7x - 6x < 10 +3

X < 13

B) 5x - 9 > 2x + 12

5x - 2x > 12 +9

3x > 21

X >21/3

X> 7

C) - 4x > 20

X >20/4

X>5

D) 5 - 3. (x+8)<x - 11

5 - 3x - 24 < X - 11

3x - x < - 11 - 5

2x < - 16

X < - 8