The perimeter of a parallelogram abcd is 30 cm. ad is 3 cm more than twice ab. find the length of ab

In the parallelogram described above, the value of ab is equal to cd and value of ad is equal to bc. If we let x be the length of ab and that x + 3 be the length of ad, the equation that would allow us to find the value of x is,

2 (x) + 2 (x + 3) = 30

The value of x from the equation is 6. The length of ab is therefore 6 cm.