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Verified answer
Jawabn1. x1 + n2. x2= (n1+n2) xs
4(800.000) + 5(x2) = (4+1)(840.000)
5x2 = 5(840.000) - 4(800.000)
x2 = 1.000.000 /(5)
x2 = 200.000