Question

10)12x-24=-3x+6

11)24x-12=-12x+60

12)16x-15=-2x+21

13)17x-9=+7x+21​

Answer 1

Resposta:

10)

$\sf{x = 2 }$

$\sf{12x - 24 = - 3x + 6 }$

$\sf{12x24 + 3x = 6 }$

$\sf{12x3x = 6 + 24 }$

$\sf{15x = 6 + 24 }$

$\sf{15x = 30 }$

$\rightarrow \boxed{\sf{x = 2 }}$

11)

$\sf{x = 2}$

$\sf{24x - 12 = - 12x + 60 }$

$\sf{24x - 12 + 12x = 60}$

$\sf{24x + 12x = 60 + 12}$

$\sf{36x = 60 + 12 }$

$\sf{36x = 72}$

$\rightarrow \boxed{\sf{x =2 }}$

12)

$\sf{x = 2 }$

$\sf{16x - 15 = - 2x + 21 }$

$\sf{16x - 15 + 2x = 21}$

$\sf{16x + 2x = 21 + 15}$

$\sf{18x = 21 + 15 }$

$\sf{18x = 36}$

$\rightarrow \boxed{\sf{x = 2 }}$

13)

$\sf{x = 3}$

$\sf{17x - 9 = + 7x + 21}$

$\sf{17x - 9 - 7x = 21}$

$\sf{17x - 7x = 21 + 9}$

$\sf{10x = 21 + 9}$

$\sf{10x = 30}$

$\rightarrow \boxed{\sf{x = 3 }}$

Explicação passo-a-passo:

(espero ter colaborado)