SOLUTION: Could someone help me on this problem? I need to solve the follwing systems by substitution: 8x -4y = 16 y = 2x -4 Thanks, Sher

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Could someone help me on this problem? I need to solve the follwing systems by substitution: 8x -4y = 16 y = 2x -4 Thanks, Sher      Log On


   

Question 58667This question is from textbook Beginning Algebra
: Could someone help me on this problem?
I need to solve the follwing systems by substitution:
8x -4y = 16
y = 2x -4
Thanks,
Sher This question is from textbook Beginning Algebra

Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
+8x+-4y+=+16+
+y+=+2x+-4+
Substitute the second equation into the first
+8x+-4%282x+-+4%29+=+16+
Distribute the -4
+8x+-+8x+%2B+16+=+16+
combine like terms
+16+=+16+
Because the X values canceled and you are left with a number equalling itself .... ANY oredered pair will satisfy the equations, because they are the EXACT same line