IDNStudy.com, kung saan nagtatagpo ang mga eksperto para sagutin ang iyong mga tanong. Makakuha ng mabilis at eksaktong sagot sa iyong mga tanong mula sa aming mga eksperto na laging handang tumulong.




Age Word Problem





5 years from now Sharon will be twice as old as Tiffany. 

The current sum of the ages of Sharon and Tiffany is 86. 

How old is Tiffany right now?





Sagot :

[tex]Sharon : \ x \ \ years\\Tifany : \ y \ \ years\\\\Sharon : \ \ x + 5 = 2(y+ 5) \\Sharon + Tiffany : \ \ x+y = 86\\\\\begin{cases} x + 5 = 2(y+ 5) \\x+y=86 \end{cases}[/tex]

[tex]\begin{cases} x + 5 = 2 y+ 10 \\ y=86 -x \end{cases}\\\\substitution :\\x+5=2(86-x)+10 \\x+5=172 -2x+10\\ \\x+2x=172+10-5\\3x=177 \ \ / :3\\x=59 \ yares[/tex]

[tex]y=86-x\\y=86-59 \\ \\y= 27 \ yares \\ \\ Answer : \ \ Tiffany \ is \ now \ 27 \ years.[/tex]




86/2=43
43-5=38
38/2=16
16+5=21

answer: 21 y/o