There are four basic properties of numbers: commutative, associative, distributive, and identity. You should be familiar with each of these.
Cancellation Law for Addition: If a+c = b+c, then a = b. This follows from the existence of an additive inverse (and the other laws), since Page 5 if a+c = b+c, then a+c+(−c) = b+c+(−c), so a +0= b + 0 and hence a = b. a = b.
The Cancellation law of addition states that a= b if and only if a+c = b+c which is similar to the Addition Property of Equality that says that one can add the same quantity to both sides of an equation so if you have a = b then you can add c to both sides to get that a+c = b+c.
Closure Property of Addition for Whole Numbers Addition of any two whole numbers results in a whole number only. We can represent it as a + b = W, where a and b are any two whole numbers, and W is the whole number set. For example, 0+21=21, here all numbers fall under the whole number set.
Cancellation Properties: The Cancellation Property for Multiplication and Division of Whole Numbers says that if a value is multiplied and divided by the same nonzero number, the result is the original value.
Closure property holds for addition, subtraction and multiplication of integers. Closure property of integers under addition: The sum of any two integers will always be an integer, i.e. if a and b are any two integers, a + b will be an integer.
Cancellation law for addition: If a+b=a+c, then b=c. We assume that a+b=a+c. By the Existence of Negatives Axiom, we know that there is a number y such that y+a=0.
Sec. 42-150. - Building line requirement. Tract DescriptionMinimum Building Line Requirement Multi-unit residential reserve 5 feet, if the multi-unit residential use meets the standards of section 42-237 All others 10 feet All tracts 5 feet for habitable structures All tracts 5 feet27 more rows
"Closed under addition" means that if you have two vectors in the set (a,b,c) and (d,e,f) then the vector (a+d , b+e , c+f) is also in the set. You are correct that the condition equation = 0 will define a set that is closed under addition.