What value of x makes the equation true?

–8.6 = –4.1 + x

a. –12.7

b. –4.5

c. 4.5

d. 12.7

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220