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In this problem, we have been asked to solve the given system of equations.
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Negative 3x plus 7y is 15, and 8x minus 9y is equal to negative 11.
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So let's consider this as equation 1.
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Let's consider this as equation 2.
00:18
So first of all, we're going to multiply equation 1 by 8.
00:22
So first of all, let's multiply the left -hand side by 8.
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So we have negative 3x times 8, that's negative 24x, plus 7y times 8, so plus 15.
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And this is equal to 15 times 8.
00:35
That's the right -hand side multiplied by 8, so we have 120.
00:39
And let's multiply equation 2 by 3.
00:42
So 8x times 3, that will be 24x, and then we have negative 9y times 3, so negative 27y, and negative 11 times 3, negative 33.
00:51
So let's add these two.
00:53
So negative 24x and 24x, that gets canceled out.
00:57
And over here we have 56y minus 27y, y, that's.
01:00
That's going to be 29y...