The answer is 7x-35
You multiply 7 by 5, then you remove the parenthesis, and rewrite the problem.
The graph in the attached figure
Step-by-step explanation:
Let
x -----> the number of stools
y ----> the number of recliners
we know that
-----> inequality A
----> inequality B
using a graphing tool
The solution is the triangular shaded area (remember that the number of seats cannot be a negative number)
see the attached figure