In Parallelogram JKLM KU=3x+3 and UM=4x-4 how do I solve for x. KM is diagonal line with U as its center point

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

25% is the answer

the first option is the answer.