the value of the bottom row is 75
let t = value of triangle
let c = value of circle
let r = value of rectangle
2c+2t = 74
=> c +t = 37...............
c+t+2r = 63
=>2r = 63-37
=>r = 13............()
2c + 2r = 70
=> c = 22..............()
but, c +t = 37
=>t = 15
the value of the last row is
2t+c+r= 30+22+13
= 65.
