Answer:
Step-by-step explanation:
we have
E------>the number of sit-ups
m----> the time in minutes
S----> the number of sit-ups after drinking the sports drink
----> equation A
----> equation B
substitute the equation A in the equation B
Answer:
yes thats good
Step-by-step explanation:
7x - 5 = 0
7x = 5
x = 5/7
--------------------------
It would be 7x3 which would equal 21. Hope that helped!