12 = (2/7)f
so f = (7/2)12 = 42
42 - x = 4(12 -x)
42 - x = 48 - 4 x
3 x = 6
x = 2 years ago
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check
that was when Amanda = 10 and father = 40
good, that works :)
amamda is 12 years old. she is 2/7 times as old as her father. how many years ago was her father 4 times as old as amanda?
2 answers
butt how old was her father 4 times old s amanda??