<u><em>Answer:</em></u>
<u><em>Step-by-step explanation:</em></u>
<u><em>Please give me brainliest.</em></u>
First you would need to combine like terms. do you know how to do that?
Answer:
The answers are 3 and 5
The only thing u had to do is
x-5=0
x=5
7x-21=0
7x=21
x=3
Answer: 1-20=2 and 60-80=4
Step-by-step explanation:
the first is 2 number of building
and the third one is 4 number of buldings
Hope this helps :)