Solve using the substitution method.
5x − 7y = −16, 2x + 8y = 26

Question

mertsj · Answer

Divide the second equation by 2 and solve it for x 
You will get x=13-4y
Put that into the first equation in place ofx

anonymous · Answer

i would use the 2nd equation to substitute because the numbers are more simple.
get down to x =( )
so 2x +8y = 26
2x = 26 -8y
  x = (26 - 8y)/2
  x = 13 -4y

now you can replace this x into the other equation

5x - 7y = -16
replace the x
5(13 - 4y) - 7y = -16
65 - 20y - 7y = -16
solve for y
-27y = -71
y = 3

replace y=3 into any equation to find x
 2x + 8y = 26
2x + 8(3) = 26
2x + 24 = 26
2x = 2
x =1
y = 3

anonymous · Answer

Ok mertsj I am still confused

mertsj · Answer

Can you divide the second equation by 2?

mertsj · Answer

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