Question

solve each system by substitution
Please show how you got it and also how you found Y... Thanks :)
-x+2y=-7
-2x-6y=-14

Answer 1

Am I just doing your homework for you, or are you getting anything out of this?

Answer 2

i am have some of the problems worked out it just i need to make sure i am doing it right ...but i am still doing it wrong

Answer 3

the first step of substitution is to set one side equal to a variable. So-
-x=-2y-7
then you plug in the new equation for the variable into the second equation
2(-2y-7)-6y=-14 (we changed the -2 to +2 because our equation is set to -x)
then solve
-4y-14-6y=-14
-10y=0
y=0
then you plug the new y into the first equation
-x=-2(0)-7
-x=-7
x=7