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THE SEATING ARRANGEMENT FROM LEFT TO RIGHT IS: ANDREW, ALEXANDRIO, JIMMY, KIAN AND JUSTIN. NAMEBLOOD GROUPAGEHEIGHTWEIGHT ANDREWA666166 ALEXANDRIOO317576 JIMMYAO104197 KIAN B 61 49126 JUSTINAB476141 THEY ARE 10.5 AND 0.5 YEARS OLD. A COMMON WRONG ANSWER IS 10 AND 1. THIS IS WRONG BECAUSE THE DIFFERENCE IN AGE WOULD BE 9, NOT 10 DANIEL IS 7 YEARS OLD AND JESSICA IS 4 YEARS OLD. LET X BE THE FATHER'S AGE. SO DANIEL'S AGE IS: X/5 IN 21 YEARS: 21 + X = 2(X/5 + 21) SOLVING FOR X WILL GIVE 35. SINCE DANIEL'S AGE IS X/5: 35/5 = 7 LET Y BE JESSICA'S AGE. SO MOTHER'S AGE IS: 7Y IN 8 YEARS: 7Y + 8 = 3(Y + 8) SOLVING FOR Y WILL GIVE 4 I AM 19 YEARS OLD AND MY SISTER IS 9. LET X = MY SISTER'S AGE AND Y = MY AGE. Y = X + 10 Y + 1 = 2(X + 1) Y = 2X + 1 SUBSTITUTING THIS RESULT IN OUR FIRST EQUATION, WE HAVE: 2X + 1 = X + 10 X = 9 SO Y = 19 WHEN MY SISTER WAS 5, I WAS 3 TIMES OLDER THAN SHE WAS