Marc is half as old as Tony and three times as old as Ben. If the sum of their ages is 40, how old is Marc?

Marc's age is 12

Step-by-step explanation:

Let

x ----> Marc's age

y ---> Tony's age

z ---> Ben's age

we know that

the sum of their ages is 40

so

-----> equation A

Marc is half as old as Tony

so

----> equation B

Marc is three times as old as Ben

so

----> equation C

substitute equation B and equation C in equation A

solve for x

therefore

Marc's age is 12

8

step-by-step explanation:

the option best identifies the textual evidence that supports this conclusion is c.) when an argument is over, how many weighty reasons does a man recollect which his heat and violence made him utterly forget? in order to recognize textual evidence is to identify the topic sentence where the author states the main idea. textual evidence is what supports the topic sentence or main idea of a passage.