Solve the Expression: 2a+b Where a=10 and b=-3

Question

Solve the following expression:

$2a+b=$

If $a=10,b=-3$

00:07 Let's begin by setting up and calculating.

00:10 We'll substitute the right values as given in the problem. Remember to use parentheses.

00:33 A positive times a negative number always results in a negative.

00:38 We'll solve it step by step, following the order of operations.

00:42 And that's how we find the solution to this question!

Let's place the numbers in the formula:

$2\times10+(-3)=$

Let's remember the rule:

$+(-x)=-x$

Let's write the exercise in the appropriate form:

$2\times10-3=$

Let's solve the multiplication exercise:

$2\times10=20$

Now we get the exercise:

$20-3=$

Therefore, the answer is:

$17$

$17$