Emmanuelpony871viz
Answered

Solve the following systems of equations by elimination:
2x – y = 7
3x + 2y = 0

Sagot :

Mlcparra16viz
2x - y = 7 ... [1]
3x + 2y = 0 ... [2]

2[1] + [2]
4x - 2y = 14
3x + 2y = 0
     7x = 14
       x = 2

So we substitute this to the first equation:
2(2) - y = 7
4 - y = 7
-y = 3
y = -3