Gutlucky261id
Answered

Solve the following systems by substitution:
3x + y = 4
4x – 3y = 1

Sagot :

Mlcparra16id
So:
3x + y = 4
y = 4 - 3x
We plug in this value in the second equation:
4x - 3(4 - 3x) = 1
4x - 12 + 9x = 1
13x = 13
x = 1

So:
y = 4 - 3x 
y = 4 - 3(1) = 4-3 = 1