How do you decide which variable to substitute when solving system of equations by substitution? Explain.
1 answer:
You might be interested in
Answer:
She walked neighbor's dog 4 times.
Step-by-step explanation:
It is given that:
Peri earned $27 for walking the dogs 3 times.
Unit rate =
Unit rate = $9 per dog
Now,
Peri worked at the same rate and earned $36.
Unit rate =
d= 36/9
d = 4
Therefore,
She walked neighbor's dog 4 times.