That is called the multiplicative identity property.
Answer and explanation:
<h2>X</h2>
3x + 6y = 180 <em>Use the original expression to find x</em>
3x = 180 - 6y <em>Subtract 6y by both sides</em>
<em>Divide by 3 to get x</em>
x = 60 - 3y
<h2>Y</h2>
x = 60 - 3y <em>Use the new expression to find y</em>
x - 60 = - 3y <em>Subtract 60 by both sides</em>
<em>Divide by -3 to get y</em>

I think the equation would be either a perimeter equation or a volume equation.
P=a+b+c (For a two-dimensional figure)
V=1/3 Bh (For a three-dimensional figure)
Answer:
3/4 greater
Step-by-step explanation:
3.25 - 2.5 = 0.75
0.75= 3/4