Q. The sum of a number and 18 is −29The equation is (Do not simplify.)
Identify Operation: Identify the math operation found in the phrase:“The sum of a number and 18The phrase says “the sum of”.“The sum of” indicates that the values are being added together.The operation is addition.
Write Expression: Write an expression to represent “the sum of a number and 18”. Let the unknown number be represented by the variable x. The expression for the sum of x and 18 is x+18.
Write Equation: Write an equation to represent “The sum of a number and 18 is −29”. The sentence can be written as an equation by setting the expression from Step 2 equal to −29. The equation is x+18=−29.