Question

solve the following system using substitution....gold medal

-5x+y=-2
-3x+6y=-12

Answer 1

Here's a way of doing it.
Solve the second equation for 6y.
Then multiply the entire first equation by 6 and solve it for 6y.
Then equate the two expressions in x that 6y is equal to.
Solve for x.
Then substitute the value of x in the first original equation and solve for y.

Answer 2

-6(-5x+y)=-12
30x+-6y=75
-3x+6y=12

27x=65
x=2.3

-3(2.3)+6y=12
-7+6y=12
6y=19
y=3.17

Answer 3

@mddrummer
1) you didn't use substitution
2) your solution is not correct