SOLUTION: Solve each of the following systems by substitution. I am having major problems with these kind of problems...HELP, ZACK 5x - 2y= -5 1 y - 5x = 3 8x - 4y = 16 y =

Algebra ->  Trigonometry-basics -> SOLUTION: Solve each of the following systems by substitution. I am having major problems with these kind of problems...HELP, ZACK 5x - 2y= -5 1 y - 5x = 3 8x - 4y = 16 y =       Log On


   

Question 101945: Solve each of the following systems by substitution. I am having major problems with these kind of problems...HELP, ZACK
5x - 2y= -5
1 y - 5x = 3
8x - 4y = 16
y = 2x - 4
This last problem the 4y and the y in the next prblem line up buy it isnt turning out like that before i submit it
Answer by brianuh(2) About Me  (Show Source):
You can put this solution on YOUR website!
5x - 2y= -5

Divide everything by 2y to get Y by itself.
so 5x divided by -2
y = -5/2x 5/2
the -5 becomes postive because negative 5 divided by negative two is a positive, so positive 5 over 2.
the answer is
y = -5/2x + 5/2




8x - 4y = 16
Divide by -4y on all sides to get y by itself. That is the ultimate goal, y to be by itself.
8 divided by -4 is -2x and 16 divided by -4 is -4.
so y = -2x -4