. 1 pts. If the present age of my father is 39 years and my present age is x years, what is x? (I) Next year my mother will be four times as old as I would be. (II) My brother is 2 years older than I and my father is 4 years older than my mother.
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we are given
father= 39
my age= x
my mom= next year would be 4 times me
∴my mom= 4x ...............i
father= 4 years older than mom
∴39= 4+4x (using i)...............ii
next year:
father's age= 39+1= 40 years ................iii
∴using ii
4+4x= 40 (we got 40 using iii)
∴4x=40-4
4x=36
x=36/4
∴x=9
∴ my age is 9 years.
father= 39
my age= x
my mom= next year would be 4 times me
∴my mom= 4x ...............i
father= 4 years older than mom
∴39= 4+4x (using i)...............ii
next year:
father's age= 39+1= 40 years ................iii
∴using ii
4+4x= 40 (we got 40 using iii)
∴4x=40-4
4x=36
x=36/4
∴x=9
∴ my age is 9 years.
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