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شائع Word Problems >

if john was four times as old as jerry 8 years ago, and if john will be twice as old as jerry 8 years from now,how old is john?

الحلّ

i f j o hn w a s f o u r t im es a s o l d a s j erry 8 ye a rs a g o, an d i f j o hn w i ll b e tw i ce a s o l d a s j erry 8 ye a rs f ro m n o w, h o w o l d i s j o hn ?

الحلّ

John^{'} s age is : 40

خطوات الحلّ

Translate the problem into an equation:

x - 8 = 4 (y - 8), x + 8 = 2 (y + 8)

x - 8 = 4 (y - 8), x + 8 = 2 (y + 8) : x = 40, y = 16

John^{'} s age is : 40

أمثلة شائعة

the number divided by 12 Five years ago, Angus was five times as Quinn was at that time. Four years from now, Angus will be twice as old as Quinn will be. What is Quinn's age now?550/22 is a square number find 2 consecutive odd integers such that 3 times the smaller is 12 more than the larger three times the sum of a number and 8 equals 2