11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
555
-1
It can do, for the right value of A
10
4a+3-a =12 4a-a = 12-3 3a = 9 a = 3
4a+5=25 4a=25-5 4a=20 a=20/4 a=5
4a + a = 25 add 4a and a 5a = 25 then divide 25 by 5 a = 5
9=4a+13 9-13=4a -4=4a -4/4=a -1=a a=-1
A = 6
a is equal to 1.
a=-12