Answer:
a=7
Step-by-step explanation:
3a+4=a+18
-1a -1a
2a+4=18
-4 -4
2a = 14
÷2 ÷2
a = 7
3a + 4 = a + 18
Add -a and -4 on both sides.
3a - a = 18 - 4
Divide 2 into both sides.
a = 14/2
