Answer:
A=1/2 or A=0.5,A=2 negative 1 on top of two.
Step-by-step explanation:
3+0.5(4a+8)=9-2a
parentheses first
3+2a+4=9-2a
add the numbers
7+2a=9-2a
move terms
2a+2a=9-7
collect the like terms and subtract
4a=2
0.5
