Solve each system using substitution: 7x-2y=1 2y=x-1

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asked Feb 7, 2018 212k views

1 Answer

Jinx · Answer 1 · 2018-02-11T20:38:04+0000

Hello :
7x-2y=1 ...(1)
2y=x-1...(2)
substitution 2y in (1) :
7x-(x-1) = 1
7x-x+1 = 1
7x = 0
x=0
in (2) : 2y = 0-1
2y = -1 y= -1/2
the system have one solution : (0 ;-1/2)

Solve each system using substitution: 7x-2y=1 2y=x-1

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