Question

$<var>3.(12)=1.(2 x-4)</var>$

Answer 1

$<var>3\times12 = 1(2x-4)</var>$

$<var>36 = 2x-4</var>$

$<var>36 + 4 = 2x</var>$

$<var>40 = 2x</var>$

$<var>\frac{40}{2} = x</var>$

$<var>20 = x</var>$

 

resposta :

x = 20

Answer 2

 

3(12) = 1(2x - 4)

 

Efetuando:

 

36 = 2x - 4

 

2x = 36 + 4

 

2x = 40

 

x = 40/2

 

x = 20