## Find no. of non negative integral solutions, Mathematics

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Find no. of non negative integral solutions

x1+x2+x3+4x4=20

Solution)  140. Break them into prime factors . Put 4 = 2^2 and every variable will have factors in 2,3,5 with a power. Find individualy of 2 3, 5 and multiply

1/2+3/4

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