(solve for the system of equations)
-7x-3y=-1
9x+5y=7

Question

(solve for the system of equations)
-7x-3y=-1
9x+5y=7

anonymous · Answer

Matrix? 
Solve for augment matrix!!

anonymous · Answer

-7 -3 -1
 9   5   7

anonymous · Answer

im not working with matrix

anonymous · Answer

Oop sorry then solve by substitution?

anonymous · Answer

thats the problem i don't remember how):

anonymous · Answer

Just solve for x on each one first. Like this:
-7x-3y=-1
-7x     =-1+3y        ---I added 3y to both sides
   x      =1/7-3y/7   ---Divided -7 to both sides.

anonymous · Answer

And then after you do it for the second equation we can susbtitue x from both equations and then we only have to solve for y

anonymous · Answer

9x+5y=7 
x        =7/9-5y/9

anonymous · Answer

x      =1/7-3y/7
x        =7/9-5y/9 

7/9-5y/9 =1/7-3y/7
Solve for y now.


After you find y plug it back in to one of the original equations again and solve for x.

anonymous · Answer

ok thanks man(: