Question

Please Explain! Solve Each system by substitution or elimination:
1.{y=2x+8}
{y=3x-1}

Answer 1

notice the 1st equation, is saying that y = 2x +8

so use THAT instead of "y" in the 2nd one and SUBSTITUTE it with the equivalent from the 1st one, and solve for "x"

Answer 2

I dont' really understand :/

Answer 3

since we \(\bf \color{red}{y}=2x+8\\
y=3x-1\implies (\color{red}{2x+8})=3x-1\)