Perimeter = 2L + 2W
42= 2L + 2(8)
26 = 2L
13 = L
5+15=20
20x3=60
I'm probably wrong, but thats how I understood the question.
X will equal 5
y will equal 0
here,
2x-6y= -12
2(x-3y)= -12
x-3y = -6...........eq1
x+2y=14............eq2
we can subtract the above two given equations
we get,

___________

so,
y=4
now to find the value of x we have to substitute the value of y in any of the above two equations, I choose eq2
we get,

<h3>so,</h3><h3> x=6,y=4</h3>