Hillcerbitviz
Answered

Solve the following by substitution:
2x + 3y = 1
x - y = 3

Sagot :

Mlcparra16viz
We can make the second equation as follows:
x - y = 3
x = y + 3

So we plug this in to the first equation:
2(y + 3) + 3y = 1
2y + 6 + 3y = 1
5y = -5
y = -1

So: x = -1 + 3 = 2