How do you solve kx+3x=4 and what is x?

Question

How do you solve kx+3x=4 and what is x?

Answer 1

kx + 3x = 4

factor out x:

x(k + 3) = 4

divide both sides by k+3:

x = 4/(k+3)

Answer 2

kx + 3x = 4

x(k+3) = 4

x = 4/(k+3)

x is a variable, whose value varies depending on what k equals. k is an unknown constant. they could use c for constant, which is the 1st letter of "constant." But k has that c sound too, so k gets used sometimes. math uses earlier alphabet letters for constants, and end of the alphabet letters for variables, like x, y and z.

Answer 3

The value of x depends on the value of k.

For instance: if k = 0 , then x = 4/3

if k = 1 , then x = 1

if k = 2 , then x = 4/5