The properties that justify the steps taken to solve the given
system are as follows:
6x – 8y = 18, 2x + 8y = 6
[Multiplication property of equality]
8x = 24
[Addition property of equality]
x = 3
[Division property of equality]
3(3) – 4y = 9
[Substitution property of equality]
9 – 4y = 9
[Simplify]
-4y = 0
[Subtraction property of equality]
y = 0
[Division property of equality]
Answer:
L=80
W=20
Step-by-step explanation:
Perimeter = 2×L+2×w
L=w+60
Perimeter - 2×60 = 4×w
200-120 = 80
80/4= w = 20
L=w+60 = 80
Answer:
and 
Step-by-step explanation:
The first answer you are just adding 4 and 1/4. The second answer you are adding a negative number with a postive fraction so you get a negative fraction.