SOLUTION: I'm not sure what to do here... Can I get some help? Solve using the substitution method. 5x

SOLUTION: I'm not sure what to do here... Can I get some help? Solve using the substitution method. 5x - 3y = 8, -5x + y = 4

Question 579132: I'm not sure what to do here... Can I get some help?

Solve using the substitution method.
5x - 3y = 8, -5x + y = 4
Found 2 solutions by mananth, josmiceli:
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
-5x+y=4 .............1
y=4+5x

5x-3y=8
Substitute y in (2)
5x-3(4+5x)=8
5 x + -12 -15 x = 8
5 x -15 x = 20
-10 x = 20
/ -10
x= -2
Plug the value of x in (1)
-5x+y=4
-5*-2+y =4
10+y=4
y = -6

m.ananth@hotmail.ca

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
(1)
(2)
To do substitution, take one of the equations
and isolate either or on one side
-----------------
Add to both sides of (2)
(2)
Now substitute this value of for
the in equation (1)
(1)
(1)
Add to both sides
(1)
(1)
Divide both sides by
(1)
Now substitute this value for back
into either (1) or (2)
(1)
(1)
Add to both sides
(1)
Divide both sides by
(1)
check answers:
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
(1)
OK
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