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OpenStudy (anonymous):
In 4 years, mary will be twice as old as she was last year. How old is mary now?
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Parth (parthkohli):
If mary is x years old, then she was x - 1 last year. Agree?
OpenStudy (anonymous):
Agree
Parth (parthkohli):
So, x + 4 = 2(x - 1) Solve!
OpenStudy (wasiqss):
wa wa parth dimag chal raha hai :D
OpenStudy (wasiqss):
@baita
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Parth (parthkohli):
Lol was thank you
OpenStudy (apoorvk):
Let Mary's present age be 'x' So her age an year ago = x-1 after four years, her age = x+4 So what would the equation for the relation between the two ages be?
Parth (parthkohli):
twice as old.......as she was last year
OpenStudy (apoorvk):
Solve that^
OpenStudy (anonymous):
6 years. Thanks @ParthKohli and @apoorvk
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Parth (parthkohli):
TEEHEE!
OpenStudy (apoorvk):
Righty-right!
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