Problem 622

Solve the system by the substitution method.

 

2x+14y=-2………….(1)

X=-1-7y…………..(2)

 

 

Solution:-

 

From equation 1 takeĀ  2 common

2(x-7y)=-2

x-7y=-1……………………(3)

x+7y=-1……………………(2)

add both equation

2x=-2

X=-1

Put this value in equation 2

-1+7y=-1

7y=0

Y=0

 

So these equation have exact one point as solution

 

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