For the following system of equations, what is the x-value of the solution? –x + 2y = 6 6y = x + 18
A. –18
B. 0
C. –6
D. 3

Question

For the following system of equations, what is the x-value of the solution?  –x + 2y = 6 6y = x + 18
A. –18
B. 0
C. –6
D. 3

anonymous · Answer

ok well for starters, lets get x by itself in one of the 2 equations

anonymous · Answer

Or you can add the equations together right away and get down to one variable in 1 step. This is the elimination method. Which would you like to do? Elimination or Substitution

anonymous · Answer

@brittan_leann11 what method do you want to do?

anonymous · Answer

0 as you can substitute y=(x+18)/6 into the other equation. you end up with -4x+36=36