Answer:
the answer is 4x-3
Step-by-step explanation:
Answer: The answer is x = -10
z = 0
3 (z + 7) = 21
3z + 21 = 21
3z = 0
y = 2x + 13
Positive value:
2x + 13 > 0
2x > -13
x > -6.5
Negative value
2x + 13 < 0
2x < -13
x < -6.5