Answer:
MJ is 13 units in length
Explanation:
in parallelograms, opposite sides are congruent
therefore, side KL is the same as JM which we know is 3x+12
now we need to find the value of 'x' which we can do by setting the other two sides equal as follows:
4x+9 = 6x-25
subtract 4x from each side to get:
9 = 2x-25
add 25 to each side to get:
34 = 2x
divide by 2
x = 17
now we can find the length of MJ by substituting 17 for 'x' in 3x+12
3(17)+12 = 51+12 = 63