1- Resolva a inequação abaixo, encontrando uma condição para x
[tex]x + 13 > 3x - 3[/tex]
A) x >8
B) x <5
C)x >5
D) x<8
[tex]x + 13 > 3x - 3[/tex]
A) x >8
B) x <5
C)x >5
D) x<8
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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