Answered

Makakuha ng detalyadong mga sagot sa iyong mga tanong gamit ang IDNStudy.com. Makakuha ng mga sagot sa iyong mga tanong mula sa aming mga eksperto, handang magbigay ng mabilis at tiyak na solusyon.

carol is five times as old as her brother. she will be three times as old as her brother in two years . how old is carol?

Sagot :

Kikoriotsoidn
Let 'x' be Carol's age at present
     'y' be her brother's age at present
Two years from now:
Let 'x+2' be Carol's age two years from now
     'y+2' be her brother's age two years from now
---------------------------
Carol is five times as old as her brother
x = 5y   ------equation 1
--------------------------
she will be three times as old as her brother in two years
x + 2 = 3(y+2)   ----equation 2
------------------------
From equation 2:
x+2= 3(y+2)
x+2 = 3y + 6
x = 3y + 6 - 2
x = 3y + 4   -----equation 3
-----------------------
Substitute equation 3 to equation 1
x = 5y
3y + 4 = 5y
5y - 3y = 4
2y = 4
y = 2
---------------------
Substitute y=2 to equation 1
x = 5y
x = 5(2)
x = 10
---------------------
Therefore at present,Carol is 10 years old while her brother is 2 years old.
Ang iyong aktibong pakikilahok ay mahalaga sa amin. Magpatuloy sa pagtatanong at pagbibigay ng mga sagot. Sama-sama tayong lumikha ng isang komunidad ng karunungan. Bawat tanong ay may sagot sa IDNStudy.com. Salamat at sa muling pagkikita para sa mas maraming solusyon.