Answer:
53
Step-by-step explanation:
3x +17= 7x-31
17+31 = 7x-3x
48 = 4x
48/4= x
12=x
x=12
KL= 3x+17= 7x+31
using KL= 3x+17;
KL= 3(12) +17
KL = 36+17
KL=53
