Solve the following system of equations by the substitution method.

x - y = 0
x - y - 2 = 0

What is the solution set?

{(1, -1)}

{(-1, 1)}

Ø

Question

Solve the following system of equations by the substitution method. 

x - y = 0
x - y - 2 = 0

What is the solution set?



{(1, -1)}

{(-1, 1)}

Ø

anonymous · Answer

i meant to put    For the following system, use the second equation to make a substitution for y in the first equation.

3x + y = 1
y + 4 = 5x

What is the resulting equation?



3x + 5x - 4 = 1

3x + 4 - 5x = 1

3x + 5x + 4 = 1

anonymous · Answer

@mathman806  @math&ing001 @MathLegend

math&ing001 · Answer

Well you basically just plug in the second equation y = 5x - 4 in the first ...

anonymous · Answer

rewrite equation 2 to $ y = \color {green} {5x-4} $

change $ 3x+\color{red}{y} =1$ for $3x+\color {green}{(5x-4)}=1$