Step-by-step explanation:
I have answered ur question
Answer:
5:1
Step-by-step explanation:
Originally the ratio is 20:4
but then it is simplified to 10:2
then 5:1
X-1/x= 2
x-1=2x
x-2x=1
-x=1
x=-1
x+1/x
-1+1/-1
0/-1
0
it equals 0
“a” would equal 7!! hope this helps :)