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Karo-lina-s [1.5K]
3 years ago
7

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

Mathematics
1 answer:
Mrrafil [7]3 years ago
7 0
Hello :
<span>7x-2y=1 ...(1)
 2y=x-1...(2)
</span><span>substitution  2y in (1) :
</span>7x-(x-1) = 1
7x-x+1 = 1 
7x = 0
x=0
in (2) :   2y = 0-1
2y = -1        y=  -1/2
the <span>system have one solution :  (0 ;-1/2)</span>
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