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Answer:
Step-by-step explanation:
l=8

Answer:
or (1,1)
Step-by-step explanation:
You can apply the Method of substitution.
Knowing that
(second equation), you can substitute it into the first equation and solve for the variable y:

Now you need to substitute
into the second equation
to calculate the value of the variable x. Then:

Then, the solution is:
or (1,1)