1. The present age of Jacob and his son are x years and y years respectively. Five years hence, the age of Jacob will be three times that of his son. Write a linear equation for this information
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Solution
As the present age of jacob is x years, and his son is y years.
After 5 year the ages will be x+5 and y +5
And this age of jacob is three times of his son,
So x+5 = 3(y +5) is the required equation.