WEBVTT
00:00:00.720 --> 00:00:01.990
Which equation is wrong?
00:00:02.480 --> 00:00:19.910
A) Two plus four is equal to six minus one, B) six minus two is equal to three plus one, C) five plus one is equal to zero plus six, D) two plus three is equal to four plus one, or E) one plus three is equal to eight minus four.
00:00:20.430 --> 00:00:27.270
In order to know which equation is wrong or incorrect, we need to go through and simplify every single equation.
00:00:27.910 --> 00:00:29.190
So let’s begin with A.
00:00:30.040 --> 00:00:32.610
Is two plus four equal to six minus one?
00:00:33.270 --> 00:00:39.000
Well, two plus four is equal to six, and six minus one is equal to five.
00:00:39.590 --> 00:00:41.170
Is six equal to five?
00:00:41.720 --> 00:00:42.220
No.
00:00:42.390 --> 00:00:43.930
So equation A is wrong.
00:00:44.480 --> 00:00:47.450
Now let’s go ahead and go through all of the other ones just to be safe.
00:00:48.180 --> 00:00:51.380
For B, we have six minus two is equal to three plus one.
00:00:51.900 --> 00:00:57.300
Well, six minus two is equal to four, and three plus one is also equal to four.
00:00:57.600 --> 00:01:01.400
So four is indeed equal to four, so this is correct.
00:01:02.170 --> 00:01:03.080
Now let’s look at C.
00:01:03.860 --> 00:01:06.330
Is five plus one equal to zero plus six?
00:01:06.520 --> 00:01:11.970
Well, five plus one is equal to six, and zero plus six is also equal to six.
00:01:12.770 --> 00:01:14.290
So C is correct.
00:01:14.960 --> 00:01:18.980
For equation D, we have two plus three is equal to four plus one.
00:01:19.200 --> 00:01:24.310
And two plus three is equal to five, and four plus one is also equal to five.
00:01:24.660 --> 00:01:25.650
So this is correct.
00:01:26.220 --> 00:01:27.520
Now, lastly, let’s look at E.
00:01:27.940 --> 00:01:31.660
It should be correct because we think we’ve already found the wrong one, A.
00:01:32.400 --> 00:01:36.240
So we have that one plus three is equal to eight minus four.
00:01:36.610 --> 00:01:41.500
Well, one plus three is equal to four, and eight minus four is equal to four.
00:01:41.870 --> 00:01:43.300
So this is also correct.
00:01:43.760 --> 00:01:46.310
So the equation that is wrong must be A.