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Maths Puzzle
Numerical Ability
how do i compute the square root of a real number,so that i can use the formula in a programming language?
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1.) 3x+y=15
y=3
2.)3x-2y=12
-y+9=x
Ali is 30 years younger than his father.if thier cobnied age is 80 years.how old is each person.