I was able to calculate the area ( 7.5 * 4 = 30 ), but don't know how to solve for X. Please see the attached image/picture. Thanks.
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where is the attached image?????
Area of parallelogram=b*h=7.5*4=30
let triangle containing x be AXD and other triangle be CYD
both are right angled triangles and vertical angles.
so they are similar.
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