Question

1- Resolva a inequação abaixo, encontrando uma condição para x

$x + 13 > 3x - 3$

A) x >8
B) x <5
C)x >5
D) x<8​

Answer 1

Resposta:

D) x<8

Explicação passo-a-passo:

x+13>3x-3

x+13>3x-3

x+13-3x>3x-3-3x

x+13-3x>-3

x+13>3x-3

x+13-3x>-3

x+13>3x-3

x+13-3x-13>-3-13

x-3x>-3-13

x+13>3x-3

x-3x>-3-13

x-3

1x-3x

(1-3)x

-2x

x-3x>-3-13

-2x>-3-13

x-3x>-3-13

-3-13

-(3+13)

-16

x-3x>-3-13

-2x>-16

-2x÷(-2)<-16÷(-2)

x<16÷2

-2x÷(-2)<-16÷(-2)

x<8

-2x>-16

x<8

Resposta

x<8