Posted by **ann** on Thursday, July 26, 2007 at 6:41am.

solve the systems of equation: First : 4x-2y = 2 Second: y = -4x-7

Should i solve by using substitution, elimination or multiply then use elimination?

Try adding them. Add up the left sides and the right sides (after rearranging the second equation) the x term will drop out, giving you

4x -2y = 2

-4x-y = 7

-3y = 9

y = -3

For x, substitute y=-3 into the first equation

x = (1/4)(2 +2y) = -1

## Answer this Question

## Related Questions

- Math - x=-y+3 5x-y=-2 Solve using Elimination I already solved the equation ...
- algebra2 - solve the equation: First: x + 3y = 5 Second: 3x - y = 5 should i use...
- algebra - I just need a quick check before I hand in my work if you would......
- algebra - i need help with these problems (either a solution or how to plug them...
- Algebra 1 - bobpursey, In this problem you helped me with earlier: Solve using ...
- HELP! - The problem using elimination/substitution methods what is the solution ...
- math/ elimination& substitution - how do i solve this? using elimination or ...
- algebra 2 - Nonlinear systems Solve the system by elimination. y=x^2+2 -4x-y=10 ...
- Algebra Multiple Choice - Hello, This is the last of questions I have for my ...
- algebra - I have a few problems I need you to take a look at and tell me if I ...

More Related Questions