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 the second equation by -6

anonymous · Answer

We have just done 3 of these..duh.

amistre64 · Answer

5 -6 = 6
1 -1 = 12

y = (60-6)/(-5+6)
   = 54 / 1

x = (-72+6)/(-6+5)
   = 66/ 1

66 − 54 = 12 ... its good i believe

amistre64 · Answer

i think that is called cramers rule that i did