Question 174673
let L and W be the sides of the rectangle and Z be the diagonal
:
2L+2W=28.....eq 1
L+W+Z=24.....eq 2
L+2=Z........eq 3
:
take Z's value of L+2 from eq 3 and plug it into eq 2
:
L+W+(L+2)=24--->2L+W=22....revised eq 2
:
now we have 2 eq with 2 unknowns{{{system(2L+2W=28,2L+ W=22)}}}
:

augmented matrix{{{(matrix(2,3,2,2,28,2,1,22))}}}