00:00Since a divided by b equals c divided by d, which equals 4, then b plus d divided by a plus c
00:04The question asks for the value of the expression "times 2 times a - c divided by 2 times b - de".
00:10Now, friends, I know that a divided by b equals c divided by 0 equals 4. What was our proportion again?
00:18Yes, we can do it, friends. Can we write the numerator like this: a plus c divided by b plus de (as we saw in our properties, which equals 4)?
00:26We could write it like that, it gave the proportionality constants, right guys? Yes.
00:29So, when we take the converse, that is, the negative first power, we can write it as b plus d divided by a plus c, where the numerator is...
00:37When the denominators are swapped, since it becomes 4/1, doesn't that also change directly? The numerator and denominator are black, yes.
00:43Since it will be 4 to the power of minus 1, we write it as 1 divided by 4.
00:47So, we found this expression, friends: b plus d divided by a plus c is 1/4. Now let's move on to the general...
00:52In the diagram, a divided by b equals c divided by d, which equals 4, right guys?
01:01Friends, 2 times a times 2 times b, 2 times a, 2 times b... now what do we do? -c
01:08Minus and minus c, minus will give us the same result, friends.
01:12So what is it? 2 times a minus c divided by... when we expand the coefficients of this, keeping them independent of zero, the numerator and
01:21When we multiply the denominator by the same coefficient, what do we get when we add or subtract the numerator and denominator? That's the constant of proportionality.
01:29was giving.
01:29So what happens in this case? 2a minus c divided by 2 times b minus d, which equals 4.
01:36They'll give it, friends.
01:38This is the result.
01:39In this case, when we substitute the values, we get 1 divided by 4 multiplied by 4, which equals 1.
01:47Our answer is Bolu.
01:48Translation and Subtitles by M.K.
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