For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x + 2y = -6
3x + y = 8

Answer choices:

-2y + 6
2y - 6
2y + 6
-2y - 6

Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x + 2y = -6
3x + y = 8

Answer choices:

-2y + 6
2y - 6
2y + 6
-2y - 6

anonymous · Answer

the 3rd one...

anonymous · Answer

Can you show me how?.. I tried myself but I struggled with isolating the variable @Orion1213

anonymous · Answer

$$-x+2y=-6$$we do apply transposition on both sides... by adding x+6 on both sides of the equation...
$$x+6-x+2y=-6+x+6$$
$$2y+6=x$$
$$x=2y+6$$

anonymous · Answer

... that is to equate x in terms of the remaining terms of variables and constants...

anonymous · Answer

... got the idea? @Glorenda49

anonymous · Answer

Yes I understand completely. thank you @Orion1213