[tex]-2a = 12 -4a\\\\\implies -2a +4a=12 \\\\\implies 2a = 12\\\\\implies a= \dfrac{12}2 =6[/tex]
Answer:
Step-by-step explanation:
-2a=12-4a
+4a +4a
2a = 12
/2 /2
a = 6
