Answer:
the first
Step-by-step explanation:
i did the test
5+8a=53
8a=48
a = 48/8 =6
since 5+8a is inside the lines, that is absolute value so you can use either 6 or -6
74=ab/c
a=7c/4b
b=7c/4a
c=4ab/7
A
pls give brainliest pls