Question

calculeaza x+6 pe x+9= 0,13

Answer 1

( x + 6 ) / ( x + 9 ) = 13 / 100

100 ( x + 6 ) = 13 ( x + 9 ) → produsul mezilor = produsul extremilor

100 x + 600 = 13 x + 117

100 x - 13 x = 117 - 600

87 x = - 483

x = - 483 / 87

x ≅ - 5,55