Question 237309
First problem:
(x+3) / 5y = xy

Second problem:
-6(7y) = 13

Third problem:
-6(7y) = 13 
... you may multiply -6 and 7 first...
-42y = 13
... now divide by -42 on both sides of the eqn...
y = 13/-42
y = -0.31 
(I rounded result from 0.3095)