Posted by **jose** on Monday, February 25, 2008 at 8:53pm.

solve using substitution

4x + 3y= -3

2x + y = -1

- math -
**Christiaan**, Monday, February 25, 2008 at 9:05pm
When we look at the second equation, we can transfer the term 2x to the other side of the equality. We get that:

2x+y = -1

<=> y = -1-2x

when we replace the y in the first equation by the value we just calculated, we get that:

4x + 3y= -3

<=> 4x + 3(-1-2x)=-3

<=> 4x - 3 -6x = -3

<=> -2x=0

<=> x=0

So, we find that x=0. When we replace this value for x in the equation we earlier found for y, we get that:

y=-1-(2*0)=-1

So, we find that x=0 and y=-1

- math -
**jose**, Monday, February 25, 2008 at 9:13pm
thanxz

## Answer this Question

## Related Questions

- math - solve each system of equations by substitution. y=3x-9 please help ...
- Substitution Method-Plz help - Use the Substitution method to solve the system ...
- Calculus 2 - Evalute the integral of x/(x^2+4)dx using u-substitution and then ...
- Help please math - Solve using substitution. y = x – 2 x + y = 10 7x + 2y = - 8 ...
- algebra - i need help with these problems (either a solution or how to plug them...
- Math - how do you solve this system? I'm using substitution.. y=3x+4 y=-x^2 ...
- Math help - Solve using substitution 3x - 9y = 3 6x - 3y = -24 Solve using ...
- Math - Solve using substitution 3x - 9y = 3 6x - 3y = -24 Solve using ...
- math/ elimination& substitution - how do i solve this? using elimination or ...
- Math - I still don't know how to directly solve this problem. Can someone guide ...

More Related Questions