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

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