Answer:
200 - 200
-147 - 53
90 - 143
-229 - -86
86 - 0
Step-by-step explanation: im not sure on the last two but i tried?
Step-by-step explanation:
3x-12=12x
-12=12x-3x
-12=9x
-12/9=x
-4/3=x
x=-4/3
1
I hope this helps!