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

Question

Solve the following expression:

$2a+b=$

If $a=10,b=-3$

00:00 Set up and calculate

00:03 We'll substitute appropriate values according to the given data, making sure to use parentheses

00:26 Positive times negative is always negative

00:31 We'll solve according to the correct order of operations

00:35 And this is the solution to the 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:

$17$

$17$