Question

Help please !!!!!!


Solve and find out what X and Y equals using subsitution.

3x-y=-8
2x+5y=-45

Explain and Show all your work!

Thank you :) 

Answer 1

ok.... so... try first solving the 1st equation for "y", see what you get

Answer 2

The asker is offline. Not too interested, I'd guess.

Answer 3

First solve one equation for y
\[y = -3x -8\]

now substitute y into the other equation:

\[2x + 5(-3x - 8) = -45\]
\[2x - 15x - 40 = -45\]
\[-13x = -5\]
\[x = \frac{5}{13}\]

Then to validate find y in 2
\[2\frac{5}{13} + 5y = -45\]
\[\frac{10}{13} + 5y = -45\]
\[5x = \frac{-585}{13} - \frac{10}{13}\]
\[x = -\frac{119}{13}\]

then check in 1 as well:

\[y = -3(\frac{5}{13}) -8\]
\[y = \frac{-15}{13} - \frac{104}{13}\]
\[y = -\frac{119}{13}\]

Answer 4

oh, ok Thank You !!!!!!!!!!!!!! I get it now. sorry that i was offline. my laptop went out of battery :) but thanks again for your help polaris_s0i ! XD

Answer 5

The solution shown is incorrect.

Answer 6

y=3x+8