Question 201626
(1) d= (r-6)3
(2) d= (r+6)2
.
3(r-6) = 2(r+6)
3r-18 = 2r +12
r=30
.
check,,d = (30-6)3 =24 *3 = 72
d= (30 +6) 2 = 36 *2 = 72,,,,ok