X over x plus 1 equals 4over x plus 4?

Answer 1

x ............... 4

_____ = ______

x + 1 ....... x + 4

x(x + 4) = 4(x + 1)

x2 + 4x = 4x + 4

and so

x2 = 4 ,,, take the root square for both

the result will be

x = ±2