Step by step explanation:
You first subtract z on both sides of the equal sign
ax-bx=(z-y)
Since a and b both have a "x" you can subtract them
(a-b)x=(z-y)
then you divide "x" on both sides of the equal sign

Answer:
1. Perpendicular
2. y=5x+7
Step-by-step explanation:
brainliest please?
Answer:
1
Step-by-step explanation:
Answer:
Let x = cost of your friend's lunch.
x + x + 3 = 19
x= 8