Answer:
x = 4/( k+3)
Step-by-step explanation:
x = (4 - 3x)/k
Multiply each side by k
xk = (4 - 3x)/k*k
xk = (4 - 3x)
Add 3x to each side
xk+3x = 4
Factor out x
x ( k+3) =4
Divide each side by (k+3)
x ( k+3) / ( k+3) =4/( k+3)
