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פּוֹפּוּלָרִי Word Problems >

Denise is now 4 over 5 as old as her sister Deth. Four years ago, she was 3 over 4 as old as her sister. What are their present ages?

פתרון

De ni se i s n o w 4 o v er 5 a s o l d a s h er s i s t er De t h . F o u r ye a rs a g o, s h e w a s 3 o v er 4 a s o l d a s h er s i s t er . Wha t a re t h e i r p rese n t a g es ?

פתרון

Deth^{'} s age is : 20

Denise^{'} s age is : 16

צעדי פתרון

Translate the problem into an equation:

\frac{4}{5} x - 4 = \frac{3}{4} (x - 4)

\frac{4}{5} x - 4 = \frac{3}{4} (x - 4), x

פתור בשביל:

x = 20

age מצא את

Deth^{'} s age is : 20

Denise^{'} s age is : 16

דוגמאות פופולריות

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