Question

How do you translate “the sum of 18 and a number” into an algebraic expression?

Answer 1

Hint: In this problem, we have to translate the sentence “the sum of 18 and a number” into the algebraic expression. We know that the algebraic expression contains variables so we can assume any variable for the number. we know that the sentence contains the sum operation. We should know that an algebraic expression contains a variable for an unknown number and operators or signs for the respective operations. So, for sum, we can add the number 18 and the assumed variable, to get the algebraic form.

Complete step by step answer:
We know that the sentence to be translate is,
“the sum of 18 and a number”.
We can assume the unknown number as x
Now, here we have the number 18 and we can assume x for another number.
We know that the given operation is a sum operation. So, we can add the given number 18 and the assumed variable x.
$$\Rightarrow 18+x$$
Where 18 is the given number, plus is the addition operation and x is the unknown number.
Therefore, the algebraic expression of “the sum of 18 and a number” is $$18+x$$.

Note:
Students make mistakes in assuming a variable for the unknown number and the operation used there, which should be concentrated. We should know that an algebraic expression contains a variable for an unknown number and operators or signs for the respective operations.