If the measure of angle Jkn is a right angle and the measure of angel 4 2(3x+6) what is x

This is different from the first one can someone me

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

Finding tbe values of the variables in each kite