Answer:
The answer is -3
Step-by-step explanation:
1. Distribute -7z + 21 = 42
2. Subtract 42 - 21 = 21
3. -7z = 21
4. Divide 21 / -7 = -3
5. Answer is -3
Y= -6
and
x= 8
i hope that helps :)
Payton drives 7 3/4
and Jessie drives 6 3/8
to find how much farther Payton drives subtract them
7 3/4 - 6 3/8
find the LCD or least common denominator in the fractions
3/4 = 6/8 so now you have
7 6/8 - 6 3/8
7-6 = 1
6/8 - 3/8 = 3/8
gives you 1 3/8 miles farther
