Answer:
Round it otherwise round it because i
First step: multiply the 5(x3) and it will give you x15 or most commonly written as 15x. you should now have 15x-(-20).
Second step: since you cannot subtract -20 from 15x because it has a variable, the final answer is just 15x-(-20), or 15x+20.
Answer: 
Step-by-step explanation:
Using the same-side interior angles theorem,
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Using the alternate interior angles theorem, 
Elga’s age is 40 and Alvin’s age is 54