Answer:
1. [tex]L=2W+5[/tex]
[tex]P=2(L+W)=22[/tex]
[tex]2(2W+5)+2W=22[/tex]
[tex]4W+10+2W=22[/tex]
[tex]W=\frac{22-10}{6} =2m[/tex]
[tex]L=2W+5=2(2)+5=9m[/tex]
2. [tex]n+(n+1)+(n+2)=63[/tex]
[tex]3n+3=63[/tex]
[tex]n=\frac{63-3}{3} =20[/tex]
Therefore, the numbers are 20, 21 and 22.
3. Let [tex]x[/tex] be Aron's age; hence, Alexander's age is [tex]x-3[/tex]
[tex]x+(x-3)=53[/tex]
[tex]2x-3=53[/tex]
[tex]x=\frac{53+3}{2} =28[/tex]
[tex]x-3=28-3=25[/tex]
Therefore, Aron's age is 28 while Alexander's age is 25.
