1
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Since point p is a point that is shared, by both the line, y equals 850, and the
2
00:00:06,873 --> 00:00:13,480
line y, equals 10x plus 150, both of these lines have the same y value at that
3
00:00:13,492 --> 00:00:20,601
point. Since the y value of y equals 850 is always 850, that means that this the
4
00:00:20,613 --> 00:00:28,119
y value of 10x plus 150 at point p. So, we just need to substitute 850 into the
5
00:00:28,131 --> 00:00:36,118
spot of y, in the second equation. That gives us a single equation of 850 equals
6
00:00:36,130 --> 00:00:44,016
10x plus 150. And yes, x is the only variable in this equation.