Question

3(2x/-1)=x+4
com conta

Answer 1

6x/-1 = x+4
 multiplicando cruzado , temos :
6x = -x -4
6x+x = -4
7x = -4
x =  -4 / 7

Answer 2

3 ($\frac{2}{-1}$) = x+4 <=>
<=> 3 ($- \frac{2x}{1}$) = x+4 <=>
<=> 3 (-2x) = x+4 <=>
<=> -6x = x+4 <=>
<=> -6x -x=4 <=>
<=> -7x = 4 <=>
<=> 7x = - 4 <=>
<=> x = $- \frac{4}{7}$