Question 118613
In triangle JKL,the measure of angle j is 30 degrees less than the measure of angle K and measure angle L=80. find measure angle K.

    Let angle K be = x

    then angle J will be = x-30  degrees

       angle L  =  80  degrees
   
    sum of the three angles in a triangle = 180 degrees

      i.e , K+L+J = 180
  
            x+80+x-30 = 180

             2x = 180-80+30
                = 130

             x= 130/2 = 65 degrees

 hence angles of the triangle are , K = 65 deg, L = 80 deg  &  J = 35 deg.