4. The Sunset the age a woman and her daughter is 46 years. In 4 years time, the ratio of thier age will be 7:2 Find the present age
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Answered by
1
Answer:
The sum of the ages of a woman and her daughter is 46 years.
x + y = 46
or
y = (46-x)
;
In four years time the ratio of there ages will be 7:2
Cross multiply
2(x+4) = 7(y+4)
2x + 8 = 7y + 28
2x = 7y + 28 - 8
2x = 7y + 20
replace y with (46-x)
2x = 7(46-y) + 20
2x = 322 - 7x + 20
2x + 7x = 342
9x = 342
x = 342/9
x = 38 yrs is the woman's age
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Answered by
1
Answer:
age a woman=38years
the age her daughter=8years
Step-by-step explanation:
let current age of woman be---x
and current age of daughter---y
x+y=46
x=46-y--------1
(x+4)/(y+4)=7/2
2x+8=7y+28
2(46-y)-7y=20
92-2y-7y=20
9y=72
y=8
x=46-8=38
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