ANSWER ASAP PLEASE!!!!1
 Based on the lesson, which of the following would be the best approach for solving this system by substitution?  5x = y + 6 2x - 3y = 4 
a) Solve the first equation for x. 
b) Solve the first equation for y. 
c) Solve the second equation for x. 
d) Solve the second equation for y.