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

## Answer This Question

## Related Questions

- Pre algebra - How do I solve Quadratic equations by factoring? (for example how ...
- pre - CALCULUS - Solve the system by the method of your choice. Identify systems...
- Pre Algebra - Can someone give me an example on how to solve a proportion. 6 e...
- Pre-Algebra - How do you solve this Pre-Algebra problem: $1.25x + $2.25y = $916 ...
- Biology of Environment - Complex systems have multiple sub systems, what would ...
- algebra - How do I do substitution equations out of the equations in the system...
- Math - Could someone give me an example of a linear eqution using elimination to...
- pre-algebra - it says use equivalent ratio's to solve the proportion!!! ok is ...
- Algebra II - We are learning how to solve systems using elimination. 2y - 1 = 3x...
- Math (Algebra) - Could I have someone check my work please? If I did something ...

More Related Questions