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Madalynn Jensen
Mathematics
1 August, 10:48
3x+4y=8, 7x-8y=-69 elimination
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Elaine Everett
1 August, 11:10
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The value of x is equal to - 4.076The value of y is equal to 5.057
3x + 4y = 8
7x - 8y = - 69
To make this easier, we can multiply each term in the first equation by 2.
6x + 8y = 16
Now, we can use elimination to isolate one variable.
Combine equations.
13x = - 53
Divide both sides by 13.
x = - 4.076
We can plug this value of x into the equation to find the value of y.
3 (-4.076) + 4y = 8
-12.228 + 4y = 8
Add 12.228 to both sides.
4y = 20.228
Divide both sides by 4.
y = 5.057
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