Posted by **alejandro** on Monday, March 14, 2011 at 4:50pm.

how do i solve systems?

example- y=x-2 y=4x+1

- pre algebra -
**Reiny**, Monday, March 14, 2011 at 5:25pm
set y = y

4x + 1 = x - 2

you finish it.

- pre algebra -
**Jessica**, Monday, March 14, 2011 at 5:26pm
Multiple the first equation by -1:

-y=-x+2

Add it from the second one to get:

y=4x+1 +(-y=x+2)= 0=3x+3

Subtract 3 from both sides:

-3=3x

Divide by 3

x=-1

Plug it in for one equation:

y=(-1)-2

y=-3

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