Answer:
Step-by-step explanation:
x+3y=1
Answer: -406
Step-by-step explanation:
We have the following expression:

In addition we know:
and
If we substitute this in the expresion, we will have:

The chosen topic is not meant for use with this type of problem. Try the examples below.
y = x+4
y = 2x-5
y = x-1
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5:8 and 20:32 would be a proportion.
Easy way to find this:
Set up the proportion as a fraction.
Use the cross product property. Multiply the diagonals and if the products of the diagonals are the same, then they are proportional.