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Class 10 > Learn Mathematics > Write a pair of linear equations which has the unique...
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Write a pair of linear equations which has the unique solution x = -1, y = 3. How many such pairs can you write?

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Learn Mathematics +2 Class IX-X Tuition Linear Equations

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x+y=2 and x-y+4=0. The solution of pair of linear equations is (-1,3). We can write many equations like this.
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Formula to be used is:- Present Value= Future Value/((1+r)^n), where r is discount rate and n in number of years. So, Future value= 300 *((1+0.15)^10)+300 *((1+0.15)^9)+300 *((1+0.15)^8)+....+300 *((1+0.15)^1).
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