Solve the system by the substitution method.
2x+14y=-2………….(1)
X=-1-7y…………..(2)
Solution:-
From equation 1 take 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