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Solve the following systems of equations by elimination:
2x – y = 1
x + 3y = 4

Sagot :

Mlcparra16id
2x - y = 1 ... [1]
x + 3y = 4 ... [2] 

3[1] + [2]
6x - 3y = 3
x + 3y = 4
     7x = 7
       x = 1

2x - y = 1
2(1) - y = 1
2 - y = 1
-y = -1
y = 1