Please help? i'll do anything in return!! EMERGENCY!!!!!

Explain, in complete sentences, how you would use the substitution method to solve the following system of equations. Provide the solution to the system.
5x - y = -1
7x - 3y = 13

Question

Please help? i'll do anything in return!! EMERGENCY!!!!!


Explain, in complete sentences, how you would use the substitution method to solve the following system of equations. Provide the solution to the system.
5x - y = -1
7x - 3y = 13

hero · Answer

Hint: 
Isolate y in the first equation, then substitute the expression for y into the second equation:

5x - y = -1
5x + 1 = y

anonymous · Answer

thannk you :) I got 5 x - -1

hero · Answer

You got what?

anonymous · Answer

5x -1

anonymous · Answer

is that right? @Hero

hero · Answer

From where did you get that? Why don't you post your steps please.

anonymous · Answer

5x - y = -1
5x + 1 = y

5x - 1 because you want to get rid of the addition sign

anonymous · Answer

5x-y=-1
5x-y+(y)=-1+(y)
5x=-1+y
5x+(1)=-1+y+(1)
therefore y=5x+1.............(1)

hero · Answer

@InsanelyChaotic, your reasoning behind using 5x - 1 is flawed.

anonymous · Answer

try to do the same for the second equation then equate the two y values. u'll find the x value, i think u can help urself now?

anonymous · Answer

i cant get it.....

anonymous · Answer

try to isolate y in the second equation the way i did then we'll move bit by bit