SOLUTION: 1 plus the product of 8 and x is equal to y. The product of 12 and x plus the product of 3 and y is 39. Solve the system of equations for x and y using substitution.

Question 852320: 1 plus the product of 8 and x is equal to y. The product of 12 and x plus the product of 3 and y is 39. Solve the system of equations for x and y using substitution.
Answer by rvfer(117) (Show Source): You can put this solution on YOUR website!
y=8x+1
12x+3y=39
--------------
12x+3(8x+1)=39
12x+24x+3=39
36x=39-3
x=36/36
x=1
-----------------
12*1+3y=39
3y=39-12
3y=27
y=27/3
y=9
----
(1,9)
------------
y=8x+1
9=8*1+1
9=9
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