Question

How to solve using Substitution or Elimination??? Help!! y=3x-1 y=2x+2

Answer 1

Answer:

Step-by-step explanation:

Since both equations equals y, then both equations equal each other.

3x - 1 = 2x + 2

Subtract 2x from both sides

x - 1 = 2

Add 1 to both sides

x = 3

Plug x = 3 into one equation(doesn't matter which)

y = 3x - 1

y = 3(3) - 1

y = 9 - 1

y = 8

Answer 2

Answer:

$x=3$

$y=8$

Step-by-step explanation:

From these two equations, we can substitute the first equation into the second equation (or the other way round). This gives us:

$3x-1=2x+2$

$3x-2x=2+1$ (minus $2x$ and add $1$ on both sides)

$x=3$

To solve for $y$, we can use substitution again:

$y = 3(3)-1$ (using the first equation given)

$y=8$

Hope this helps :)