Resolvendo a inequação 3(x+ 2) > 2(2x +4) + 1, sendo x um número racionalencontraremos :(A) x > 3
(B) x - 3
(D) x 2

Explicação passo-a-passo:

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resposta:

x > - 2

Explicação:

Inequação

3 . ( x + 2 ) > 2 . ( 2x + 4 )

3 . ( x ) + 3 . ( 2 ) > 2 . ( 2x + 4 )

3 . ( x ) + 3 . ( 2 ) > 2 . ( 2x ) + 2 . ( 4 )

3x + 3 . ( 2 ) > 2 . ( 2x ) + 2 . ( 4 )

3x + 6 > 2 . ( 2x ) + 2 . ( 4 )

3x + 6 > 4x + 2 . ( 4 )

3x + 6 > 4x + 8

- 3x + 4x > 6 - 8

x > 6 - 8

x > - 2

Espero ter ajudado ;)

x< - 3

Explicação passo-a-passo:

X< -3

Explicação passo-a-passo:

3x+6>4x+8+1

3x-4x>9-6

-x>3 multiplica por-1

x< -3

3(x+ 2) > 2(2x +4) + 1

3x+6>4x+8+1

3x-4x>+8+1-6

-x>+3 ×(-1)

x<-3

resposta correta é x< -3

espero que isso ajude vc