A.: x+12=4
-12 -12
x=-8 (not answer)
B.: x-4=12x
-x -x
-4=11x
--------- (divide by 11)
11
-.36 continuos=x (not answer)
C.: x-4=12+x is same as 4-x=12+x
+x +x"
4=12+2x
-12 -12
-8=2x
-------(divide by 2)
2
-4=x (not answer)
D.: x+4=12
-4 -4
x=8(answer)
D. is the answer I got that's how I checked them all ---^ hope you get it :)