Why should u subtract 9 from both sides of the equation:

K+9=-43

Step-by-step explanation:

We should do that to do an inverse operation

Subtracting from both sides leaves you with . Since subtraction can be written as addition (adding the opposite), the addition property of equality. If two expressions are equal to each other and you add the same value to both sides of the equation, the equation will remain equal.

The goal in solving an equation is to get the variable by itself on one side of the equation and a number on the other side of the equation. ... Performing the same operation on both sides of an equation does not change the validity of the equation, or the value of the variable that satisfies it.

answer: a.   one is a factor of every whole number since every number is divisible by itself.

answer is : muchas/tipicas

have a nice day!

~recklesschicken