Answer:
13+26+52=91
Step-by-step explanation:
S=2F=2(13)=26
T=4F=4(13)=52
hope it helps
a= 20
b= 11
c= 60
a= X
b= X-9
c= 3X
i dont know how explain this i only divide 91 of total X and how b is -9 is a bit more than the answer of the division
