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22-12-2020
Mathematics

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Find the value of y for the following system of equations. 1/2x + y = 7 -1/3x + y = 7 (2, 7, or 7/2)

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22-12-2020

Answer:

(x,y)=(0,7)

Step-by-step explanation:

1/2x + y = 7

-1/3x + y = 7

As we either of the equation is equal to 7

So we can combine them

So

1/2x+y=-1/3x+y

1/2x+1/3x=0

x(1/2+1/3)=0

x=0

1/2×0+y=7

y=7

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