00:01
By with the expression 8x plus 3y plus 5, when x is 2 and y is 1, just to replace the value of the variables into the expression and then use pemdos to solve or of operations.
00:16
So let's do the first one.
00:18
So when x is 2, we're going to replace the x with 2.
00:20
So that's 8 times 2.
00:23
Let's color code that for you guys.
00:25
So that's 8 times whatever x is 2.
00:30
You always insert it in parentheses.
00:33
And then you're going to add to that 3 times whatever y is.
00:37
And y in this case happens to be 1.
00:40
So 3 times 1.
00:41
And then you're going to add 5.
00:44
You're going to do the multiplication before addition.
00:47
So you're going to multiplication from left to right.
00:49
So this is 8 times 2, which is 16...