Question

Me ajuda nessas aqui Pfv

Answer 1

Resposta:

Explicação passo-a-passo:

1)7x-4=5x+6

7x-5x=6+4

2x=10

x=10/2

x=5

2)= 5x-13>6x

= 5x-6x>13

= - x>13 (-1)

x<-13 letra A

3)2x+2>10

2x>10-2

2x>8

x>8/2

x>8

S={X E R| x>8}

4) 6x+2=50

6x=50-2

6x=48

x=48/6

x=8

Answer 2

Explicação passo-a-passo:

Primeira pergunta:

$\boldsymbol{7x - 4 = 5x + 6} \\ \boldsymbol{7x - 5x = 6 + 4} \\ \boldsymbol{2x = 10} \\ \boldsymbol{x = \frac{10}{2} } \\ \boxed{ \boldsymbol{x = 5} }$

Segunda pergunta:

$\boldsymbol{5x - 13 > 6x} \\ \boldsymbol{5x > 6x + 13} \\ \boldsymbol{5x - 6x > 13} \\ \boldsymbol{ - x > 13} \\ \boldsymbol{x < - 13} \\ \boxed{ \boldsymbol{\left\{ x \in\mathbb{R} \diagup \: x < - 13\right\}} }$

R: ITEM (A)

Terceira pergunta:

$\boldsymbol{2x + 2 > 10} \\ \boldsymbol{2x > 10 - 2} \\ \boldsymbol{2x > 8} \\ \boldsymbol{x > \frac{8}{2} } \\ \boldsymbol{x > 4} \\ \boxed{ \boldsymbol{s = \left\{ x \in\mathbb{R}\diagup \: x > 4\right\}} }$

Quarta pergunta:

$\boldsymbol{6x + 2 = 50} \\ \boldsymbol{6x = 50 - 2} \\ \boldsymbol{6x = 48} \\ \boldsymbol{x = \frac{48}{6} } \\ \boxed{ \boldsymbol{x = 8} }$

$\blue{\mathcal{ATT : ARMANDO}}$