If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?

5x − 6y = 6
x − y = 12

Add the two equations together

Multiply the second equation by −6

Multiply the first equation by −6

Multiply the second equation by 6

Question

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?

5x − 6y = 6
  x − y = 12

 Add the two equations together

 Multiply the second equation by −6

 Multiply the first equation by −6

 Multiply the second equation by 6

anonymous · Answer

Multiply second eq. by  -6.

anonymous · Answer

letter b.

anonymous · Answer

the second one is okay,but i think the fourth is right too.

anonymous · Answer

@lbf check if it so.

anonymous · Answer

the 4th one is wrong,coz it end up to -6.so +-6=-12?they cannot be eliminate.

anonymous · Answer

WHY NOT 5x − 6y = 6        A
                 x − y = 12        B

A-6B=6-(-6)*12, THAT'S RIGHT TOO!

anonymous · Answer

huh?

anonymous · Answer

I MEAN LET A MINUS THE B MULTIPLIED BY 6