Identifying operations used to create equivalent systems of equations I need the last bit which is transform system B into system C

? • B1 = C1
? • B2 =C2
? • B1 + B2 = C2
? • B2 + B1 = C1

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

answer:

your answer is: c. 196 7/8 in^3.