Answer:
x = 7
Step-by-step explanation:
first subtract 4 from both sides
-3x = -21
divide both sides by negative 3
x = 7
7 = 2x + 5
7 - 5 = 2x
2 = 2x
x = 1 ← <span>the other half of the coordinate</span>
1,2 and 5 is the answers I think
The perfect square is answer A