00:01
In this problem, we're told that the ordered pair 512 is a solution to the given system of equations.
00:06
So we want to find the values for a and b that will make it true.
00:09
Well, if 512 is a solution, that means when we substitute that into our equation, we get a true statement.
00:15
So let's focus on finding a.
00:17
What we're going to do is we're going to substitute 12 in for y and 5 in place of x.
00:22
So when we do this, we're going to have 12 equals a times 5 plus 2.
00:28
And now we just have to solve for a.
00:30
So to do this, i'm going to subtract 2 from both sides.
00:33
12 minus 2 is 10.
00:34
And remember, a times 5 is just 5a...