Answer:
[tex]25[/tex]
Equation: [tex]90x=2250[/tex]
Step-by-step explanation:
Let parking spaces in each row[tex]=x[/tex]
In [tex]1[/tex] level there are [tex]15\ rows[/tex] so total number of parking spaces in 1 level[tex]=15\times x=15x[/tex]
There are [tex]6[/tex] level so total number of parking spaces[tex]=6\times 15x=90x[/tex]
[tex]90x=2250\\\\x=\frac{2250}{90}\\\\x=25[/tex]