Start with

Subtract
from both sides:

Divide both sides by 

And thus we solved the expression for l:

Answer:
Yes, a ratio can be simplified.
Step-by-step explanation:
An example of this is 5:10, where it can be simplified down to 1:2.
Answer: There is one valid solution to the equation 5x + 8 - 7x = -4x + 1, x = -3.5.
Step-by-step explanation: