Solve the equation, justify each step with an algebraic property.

-4+-17+x.

-21 + x

Explanation:

Step 1: Given expression: - 4 + (-17) + x

Step 2: In the algebraic property, positive * negative = negative

So, - 4 + (-17) + x = - 4 - 17 + x

Step 3: Add two negative numbers, the result will be sum with minus sign

-4 - 17 + x = - 21 + x

Hence, - 21 + x is the required equation.