Question

Resolva a equação (n+4) / (n+2) = 90

Answer 1

(x-2) .(2x -3) = (x-6).(3x -1)
2x² -3x -4x +6 = 3x² -x -18x +6
2x² -3x² -3x -4x +x +18x +6 -6 =0   elimina +6-6
-x² -7x +19x=0
-x² +12x = .(-1)
x² -12x =0
x(x -12)=0
x=0
(x-12) =0
x-12=0
x= 12