Elimination Systems What to Multiply

what would the top equation become when you multiply everything by -1?

• 2x - 6y = 20

• -2x - 6y = -20

• -2x + 6y = 20

• -2x + 6y = -20

what do you need to multiply the top equation by to make a zero pair:

• 5

• -1

• 2

• -2

Solve using Elimination Method: 9x - 4y = 7 x - 4y = -17

• (-1,5)

• (-7,5)

• (7,5)

• (3,5)

Given the system of equations, what would I multiply the first equation by to eliminate the x variable?

• 4

• 2

• 1

• -2

• The x variable would be easiest to eliminate

• The y variable would be easiest to eliminate

• We would multiply top equation by 2

• Would multiply the bottom equation by 2

• This system has no solution

Given the following system check ALL that apply:

• The y variable would be easier to eliminate

• The x variable would be easier to eliminate

• Multiply the top equation by -2 to eliminate y

• Multiply the top equation by -2 to eliminate x

• The x coordinate for this system is x = -3

To eliminate a variable on the given system would you multiply one equation or both?

• You dont multiply to eliminate variables

• You will multiply one equation

• You will multiply both equations

• No need to multiply

• Multiply the top equation by -3 to eliminate x

• Multiply the top equation by 2 to eliminate y

• The solution to this system is (0,2)

• The y coordinate for this system is 0

For the given system check ALL that apply:

• Multiply the top equation by 3 to eliminate the x variable

• Multiply the top equation by 2 to eliminate the y variable

• The solution to this system is (1,-1)

• The solution to this system is (-1,1)

• Multiply the top equation by -4 to eliminate the y variable

• Multiply the top equation by 8 to eliminate the x variable

• Multiply the bottom equation by -4 to eliminate the x variable

• Multiply the  bottom equation by 8 to eliminate the y variable

• The system has an x coordinate of -4