Answer:
10 years
Step-by-step explanation:
The equivalent expression to 
<h3>What are the equivalent expressions?</h3>
Equivalent expressions are similar expressions that may have different forms but when a value is replaced with the variables in the same form provides the same answer.
From the information given, If:
- r(x) = 3x - 1
- s(x) = 2x + 1
Then the fractional form can be an expression as:

where;



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Step-by-step explanation:
-4+13=9
-16-(-29)=13F lower