Answer:
The responses to these question can be defined as follows:
Step-by-step explanation:
For point a:

For point b:


Answer:
x = 40
Step-by-step explanation:
3x + (x+20) = 180
Solutions
<span>Simplify brackets
</span>
Subtract 12 <span>from both sides
</span>
Simplify <span>18−12</span><span> to </span>6
Divide both sides by <span>5
</span>
x=<span>6/<span>5</span></span>
There were only 20 people total. What are you looking for? Am I missing something?