dyannacoulter dyannacoulter

26-05-2021
Mathematics

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Solve the system of equations : y=2x-8 and y=-x-8

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nouni2001 nouni2001

26-05-2021

Let y=2x-8 be eq. 1
And y=-x-8 be eq. 2
Multiply eq. 2 by 2
Add up eq. 1 + eq. 2
y + 2y= 2x-8 -2x-16
3y= -24 so y=-8
Replace y in the eq. 2
-8 = -x-8
x=0

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