00:01
So in this problem, we're asked to explain how to eliminate decimals in an equation that involves numbers with decimal points.
00:06
So for example, let's say i had an equation 2 .5x plus 8 equals 100.
00:13
So let's say i didn't have a calculator, so i wanted to make this easier for us.
00:17
Well, let's look at the decimal value.
00:19
It's zero, or it's in the tenth place.
00:21
So what i would have to do is multiply both sides of our equation by 10.
00:26
Because if i do this, 10 times 2 .5, we'll move that decimal point one place to the right.
00:32
So we get 25x, and then multiplying everything else by 10 is pretty easy.
00:36
We're just adding an extra zero.
00:39
Now, let's say, for example, we had 1 .23x plus 4 .2 equals 7 .538, where they're all decimal values...