Respuesta :
Step-by-step explanation:
A) opposite sides in a rectangle is always equal
B) 9x+12 = 4x +47
Transpose = 9x - 4x = 47 - 12
solve = 5x = 35
Divide both sides by 5
x = 7
One of the property of rectangle is opposite sides are equal
Therefore 9x+12=4x+47
9x+12=4x+47
5x=35
Therefore x=7
Therefore 9x+12=4x+47
9x+12=4x+47
5x=35
Therefore x=7