Question 316552
I do not know how to solve this 
13x-2y=70
2x-2y=4 
Its substituting

13x - 2y = 70
 2x - 2y =  4 (using elimination so I am multiplying this by -1 and adding to the above line to cancel out the y)

 11x + 0y =  66 --> x = 6
-2x  + 2y = -4

-2(6) + 2y = -4
-12 + 2y = -4
2y = 8
y = 4

check:
13(6) - 2(4) = 78 - 8 = 70
 2(6) - 2(4) = 12 - 8 =  4