Question 997949
3x+y= -8
4x+3y= 7
We can begin with either one of the equations, but since we have a "y" all by itself in the first equation, let's start with the first equation:
3x+y= -8
y= -8-3x
Now we plug this value for y into the second equation (Warning: If we substitute into the same equation we would get a true, but useless, statement. Always substitute into the other equation)
4x+3(-8-3x)= 7 Now we can solve for x:
4x+-24-9x= 7
= 4x-24-9x= 7 Add 24 on both sides and add x on left:
-5x= 31
x= 31/-5= -6 1/5 And y?:
y= -8-3(-6 1/5)
y= -8+18 3/5
y= 26 3/5
J