SOLUTION: Solve the equations by substitution. 7 + 2y = 8x 3x - 2y = 0 x = ? y = ?

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Question 258384: Solve the equations by substitution.
7 + 2y = 8x
3x - 2y = 0
x = ?
y = ?

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
7+2y=8x
8x+2y=-7
3x-2y=0
---------
11x=-7
x=-7/11 ans.
3*-7/11-2y=0
-21/11-2y=0
-2y=21/11
y=(21/11)/-2
y=21/11*-1/2
y=-21/22 ans.
Proof:
7+2*-21/22=8*-7/11
7-21/11=-56/11
77/11-21/11=-56/11
-56/11=-56/11