Pinadadali ng Imhr.ca ang paghahanap ng mga sagot sa iyong mga katanungan kasama ang isang aktibong komunidad. Kumonekta sa isang komunidad ng mga propesyonal na handang tumulong sa iyo na makahanap ng eksaktong solusyon sa iyong mga tanong nang mabilis at mahusay. Kumonekta sa isang komunidad ng mga propesyonal na handang tumulong sa iyo na makahanap ng eksaktong solusyon sa iyong mga tanong nang mabilis at mahusay.
Sagot :
Let 'x' be Perla's age at present
'y' be Merly's age at present
-------------------------------------------------------
Two years ago their ages were:
x - 2 ----Perla
y - 2 ----Merly
-------------------------------------------------------
Two years from now their ages will be:
x + 2 ----Perla
y + 2 ----Merly
-------------------------------------------------------
From the statement, 'two years ago Perla was 7 times as old as Merly'
x - 2 = 7(y - 2)
x - 2 = 7y - 14
transpose -2 to the right
x = 7y - 14 + 2
x = 7y - 12 -----equation 1
------------------------------------------------------
From the statement, 'two years from now Perla will be 6 years more than 4 times as old as Merly'
x + 2 = 4(y+2) + 6
x + 2 = 4y + 8 + 6
transpose 2 to the right
x = 4y + 8 + 6 - 2
x = 4y + 12 -----equation 2
------------------------------------------------------
equate equations 1 and 2
7y - 12 = 4y + 12
7y - 4y = 12 + 12
3y = 24
y = 8
------------------------------------------------------
Substitute y=8 to equation 1
x = 7y - 12
x = 7(8) - 12
x = 56 - 12
x = 44
Therefore Perla is 44 yrs old while Merly is 8 yrs old.
'y' be Merly's age at present
-------------------------------------------------------
Two years ago their ages were:
x - 2 ----Perla
y - 2 ----Merly
-------------------------------------------------------
Two years from now their ages will be:
x + 2 ----Perla
y + 2 ----Merly
-------------------------------------------------------
From the statement, 'two years ago Perla was 7 times as old as Merly'
x - 2 = 7(y - 2)
x - 2 = 7y - 14
transpose -2 to the right
x = 7y - 14 + 2
x = 7y - 12 -----equation 1
------------------------------------------------------
From the statement, 'two years from now Perla will be 6 years more than 4 times as old as Merly'
x + 2 = 4(y+2) + 6
x + 2 = 4y + 8 + 6
transpose 2 to the right
x = 4y + 8 + 6 - 2
x = 4y + 12 -----equation 2
------------------------------------------------------
equate equations 1 and 2
7y - 12 = 4y + 12
7y - 4y = 12 + 12
3y = 24
y = 8
------------------------------------------------------
Substitute y=8 to equation 1
x = 7y - 12
x = 7(8) - 12
x = 56 - 12
x = 44
Therefore Perla is 44 yrs old while Merly is 8 yrs old.
Umaasa kaming naging kapaki-pakinabang ang aming mga sagot. Bumalik anumang oras para sa higit pang tumpak na mga sagot at napapanahong impormasyon. Salamat sa iyong pagbisita. Kami ay nakatuon sa pagbibigay sa iyo ng pinakamahusay na impormasyon na magagamit. Bumalik anumang oras para sa higit pa. Imhr.ca ay laging nandito para magbigay ng tamang sagot. Bisitahin muli kami para sa pinakabagong impormasyon.