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Sagot :
Answer:
35 and 5
Step-by-step explanation:
let the son's age be x then mother's age is 7x
In 5 years
son's age = x + 5 , mothers age is 7x + 5 and
7x + 5 = 4(x + 5)
7x + 5 = 4x + 20 ( subtract 4x from both sides )
3x + 5 = 20 ( subtract 5 from both sides )
3x = 15 ( divide both sides by 3 )
x = 5
son's age is 5
mother's age is 7x = 7 × 5 = 35
Let
- present age of son=y
- present age of mother=7y
After 5years
- age of son=y+5
- age of mother=7y+5
ATQ
[tex]\\ \sf\longmapsto 7y+5=4(y+5)[/tex]
[tex]\\ \sf\longmapsto 7y+5=4y+20[/tex]
[tex]\\ \sf\longmapsto 7y-4y=20-5[/tex]
[tex]\\ \sf\longmapsto 3y=15[/tex]
[tex]\\ \sf\longmapsto y=5[/tex]
[tex]\\ \sf\longmapsto 7y=5(7)=35[/tex]
- Present age of son=5yrs
- Present age of mother=35yrs
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