SOLUTION: Solve each system of equation by elimination. Show your work. a. (6,a) b. (-4,b) c. (C,25) d. (d,-5) a {6x+5y=-20, -6x+10y=25} b. {5x-4y=23, 7x+8y=5}

Algebra ->  Expressions-with-variables -> SOLUTION: Solve each system of equation by elimination. Show your work. a. (6,a) b. (-4,b) c. (C,25) d. (d,-5) a {6x+5y=-20, -6x+10y=25} b. {5x-4y=23, 7x+8y=5}      Log On


   

Question 1165325: Solve each system of equation by elimination. Show your work.
a. (6,a) b. (-4,b) c. (C,25) d. (d,-5)
a {6x+5y=-20, -6x+10y=25} b. {5x-4y=23, 7x+8y=5}
Found 2 solutions by solver91311, Seutip:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!



     6x +  5y = -20
    -6x + 10y =  25
   ----------------
     0x + 15y =   5
            y =   1/3

    -6x + 10(1/3) = 25
    -6x           = 65/3
      x           = -65/18



John

My calculator said it, I believe it, that settles it


I > Ø

Answer by Seutip(231) About Me  (Show Source):
You can put this solution on YOUR website!
Solve each system of equation by elimination.
Show your work. (uhm sorry but i don't know what you mean
in here but i can help you with the other given)
a. (6,a)
b. (-4,b)
c. (C,25)
d. (d,-5)
a {6x+5y=-20, -6x+10y=25}
Since -6x+10y=25 you can do this
%286x%2B5y%29%2B%28-6x%2B10y%29=%28-20%29%2B%2825%29
15y=5
y=1%2F3
x=-65%2F18
b. {5x-4y=23, 7x+8y=5}
Multiply first equation by 2
10x-8y=46 then add to
7x+8y=5
17x=51
X=3
y=-2
Hope that helps!