X+y=130

4*x=(x+y-x)/3

Solve by using substitution, x=130-y

plug x into the second equation 4*(130-y)=y/3   

(The first part of the equation (x+y-x) is equivalent to just Y)

distribute the 4        520-4y=y/3

multiply both sides by 3 to isolate the variable

add 12y to both sides        1,560-12y=y      

1,560=13y      Divide both sides by 13

y=120

Plug y back into the first equation       x=130-120

x=10

d. the two authors are in awe of nature; their experiences, reveal that time in nature can change people.

explanation: