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Solve the following system of equations by elimination. SHOW ALL YOUR WORK (4 points)-3x - 3y=93x - 4y = 5

Sagot :

-3x - 3y=9 (1)

+ 3x - 4y = 5 (2) First, Add equation 1 to equation 2

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0 - 7y = 14 Then, isolate y

y= 14/ -7 = -2

Replace y in equation 2 or equation 1. Let's replace in equation 2

3x - 4(-2)= 5

3x + 8 = 5 Isolating 3x

3x = 5-8

3x = -3 Isolating x

x = -3/3= -1

Answer: y= -2 and x=-1