Answer:
3x-5y
Step-by-step explanation:
Combine like terms
4b=a then plus 10 to see if the age holds true to 3b=a in ten years. Then since the question is how old is she today? You must either add 6 to young age (of20) or minus 4 from the older (of 30).
So Betty would be 26 today.
Answer: here is a app to use
Socratic by Google
Step-by-step explanation:
Socratic by Google its on iphone and sumsung
