Answer:
Explanation:
the angles opposite each other in a parallelogram are equal to each other
60=5y
12=y
now put that into the equation
both bottom left and top right corners have an angle of 60
since all angles in the interior of a parallelogram are equal to 360
then you can set 2(60)+2(3x+60)=360
120+6x+120=360
240+6x=360
6x=120
x=20
Hope that helps :)