Consider the following system of equations. 3x + 5y = 18
6x - 5y = 20
Decide which procedures eliminate the x variable and which eliminate the y variable.
Subtract the second equation from the first equation
Add the first and second equations.
Multiply the first equation by -2; then add the two equations.
Divide the second equation by -2; then add the two equations.
Subtract the first equation from the second equation
Multiply the first equation by 2 then add the two equations.