Question

PLEASE HELP!! I GIVE MEDAL
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.

15x - y = -6
5x - 3y = -13

Answer 1

so first you want to rewrite the first equation so that you get it into y = x + b. So you want to subtract 15x from each side so that you get -y= -15x - 6

Answer 2

No do the same thing for the second equation and you get -3y = -5x - 13

Answer 3

you want make the first equation y instead of -y so divide by negative one.
Now it is y = 15x + 6.
So substitute in 15x + 6 into the second equation so that you get -3(15x+6) = -5x - 13

Answer 4

now all that's left to do is to solve the final equation

Answer 5

So distribute \[-3(15x) + -3(6); -45x - 18 \]

Answer 6

\[-45x-18 = -5x - 13\]

Answer 7

add 5x to each side and add 18 to each side and you get\[-50x = 5\]

Answer 8

all that's left to do is simplify by dividing -50 on each side and you get
x = -0.1

Answer 9

:) @jackmullen55