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I’ve done this before and I got it right, but sadly I forgot how to do it :( does anyone know how to solve ?

I’ve done this before and I got it right, but sadly I forgot how to do it :( does-example-1
User Rdaniels
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1 Answer

5 votes
Solve the system if equations by subtracting:
We get 5L = 45
L = 9

Substituting for L in s = 20L + 75 gives s = 255
So the second choice I the correct one
User Llrs
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