6.6 DAY 2: More Elimination

1. Line terms up vertically

2. Make sure one of the variables has opposite coefficients (Today, it is by multiplying…Like finding a LCD)

3. Combine the equations

4. Solve for each variable

Solve the system by using the elimination method

2x + y = 4

x = 3y = -2

-x + 3y = -92x + y = 4

-2x + 6y = -18

7y = -14

-x + 3y = -9

(3, -2)

2*

Solve the system by using the elimination method

3x + 5y =9

x = -2y = 3

9x + 2y = -12-9x + -15y = -27

9x + 2y = -12

-13y = -39

3*

(-2, 3)

Solve the system by using the elimination method

6x - 2y = 4

y = 10

5x - 3y = -10-18x + 6y = -12

10x - 6y = -20

-8x = -32

x = 4

3*

2*

(4, 10)