Answer:
1. (3, 2)
2. (-19, 55)
3. -10
4. 75
5. (-4, -8)
Explanation:
1.
y = 4x - 10
y = 2
Substitute y for 2 in the first equation!
2 = 4x - 10
Add 10 to both sides!
12 = 4x
Solve for x!
x = 3
Answer: (3, 2)
3.
y = 2x - 5
2y - 4x = ?
2(2x - 5) - 4x = ?
4x - 10 - 4x = ?
? = -10
Answer: -10
5.
y = 1/2x - 6
x = -4
y = 1/2(-4) - 6
y = -4/2 - 6
y = -2 - 6
y = -8
Answer: (-4, -8)