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Belinda Rosales
Mathematics
8 August, 11:12
Solve by Elimination x-8y=18 - 16x + 16y=-8
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Timber
8 August, 11:37
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The value of y is - 2.5The value of x is - 2.
x - 8y = 18
-16x + 16y = - 8
We can multiply each term in the first equation by 2 to better assist this elimination.
2x - 16y = 36
Now, we can use elimination.
Add equations together.
-14x = 28
Divide both sides by - 14
x = - 2
Now that we have a value for x, we can solve for y.
-2 - 8y = 18
Add 2 to both sides.
-8y = 20
Divide both sides by - 8
y = - 2.5
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