Fred is x years old. his sister, mary, is 4 years older than fred.

a) write down an expression in terms of x for mary's age.

lost > < > < > < > < > < > < > > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > > < > < > < > < > > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > > > > < > < > < > < > < > < > > < > < > < > < > > < > < > < > < > < > > < > < > < > < > > < > < __a__t__l__a_s_|

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honestly you should get that checked out because it really isn't normal