Sam gave jen 1/2 of his jujubes. jen ate 1/2 ofthe jujubes and gave rest to kyle. kyle kept 8 of the jujubes and gave the last 10 to kim.

how many jujubes did Jen eat?

Let x = the # jujubes Sam had

he gave x/2 to jen

jen eats half of it = 1/2 (x/2) = x/4

the remaining x/4 he gave to kyle

kyle kept 8 and gave 10 to Kim

so

x/4 - 8 = 10

x/4 = 18

x = 72

thus jen had 36 jujubes

jen eat 18 jujubes