Question

quanto vale 1x/5+x/7=12

Answer 1

D (x)

X = 0

X = 0

X = 0

X in (-oo: 0) U (0: + oo)

5 / x = 7/12 // - 7/12

5 / x- (7/12) = 0

5 / x-7/12 = 0

5 * x ^ -1 = 7/12 //: 5

X ^ -1 = 7/60

-1 <0

1 / (x ^ 1) = 7/60 // * x ^ 1

1 = 7/60 * x ^ 1 //: 7/60

60/7 = x ^ 1

X = 60/7

X = 60/7