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What is the solution to the system of equations below?y=-3x-9 and y= 1/3x-39

Guest Jul 3, 2017
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What is the solution to the system of equations below?y=-3x-9 and y= 1/3x-39

 

Equate the two equations:

-3x - 9 =1/3x - 39 isolate x to the LHS

-3x - 1/3x = -39 + 9

-3 1/3x = - 30 divideboth sides by -3 1/3

x = -30 / - 3 1/3

x = -30  *  -3/10

x = 90/10

x = 9 sub x in the 1st equation:

y = -3*9 - 9

y =- 36

Guest Jul 3, 2017

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