Question

$x+12=3x$

 

$-7-x=3x+17$

 

 

Answer 1

x-3x=-12

-2x=-12

x=6

 

-x-3x=17+7

-4x=24

x=-6

Answer 2

x+12=3x

2x=12

x=6

 

 

-7-x=3x+17

4x=24

x=6