Question 800104
jim= 1/2(x-5)
mother= x-5
father= x
1/2(x-5)+x-5+x=100
 2( 1/2(x-5)+x-5+x=100 )2
 x-5+2x-10+2x=200
            5x=200+15
            5x=215
             x=43

jim is 19 years old