Randytravel962viz
Answered

Solve the following systems by substitution:
3x + 5y = -6
x = 5y + 3

Sagot :

Mlcparra16viz
We have x = 5y + 3 so we plug in this value in the first equation:
3x + 5y = -6
3(5y + 3) + 5y = -6
15y + 9 + 5y = -6
20y = -15
y = -`15/20 = -3/4

So:
x = 5y + 3
x = 5(-3/4) + 3 = -15/4 + 3 = -3/4