Elimination Method of Solving a System of Equations

Solve for y.

(just the number)

Mathematical Equivalence

ON

-2x + 6y = -20

2x + 5y = -11

what is the combined resulting equation?

• x + 11y = -31

• 11y = -31

• 11x = -31

• 4x + 11y = -31

• i need tutorials

• A

• B

• C

• D

what is the resulting combined equation for the system below?

• -18x = 18

• y = 18

• 2y= 18

• 18x + 2y = 18

solve the system

• No solution

• infinite solutions

• (0,0)

• (5,1)

• (5,0)

Solve by elimination
2x + 9y = -7
6x - 3y = 9

• (-1, -1)

• (2,-1)

• (1,1)

• (1,-1)

Homer sells tickets for admission to your school play and collects a total of $104. Admission prices are $6 for adults and $4 for children. He sold 21 tickets total. Solve the system:
x + y = 21
6x + 4y = 104

• (10, 11)

• (12, 9)

• (11, 10)

• (9, 12)

5x - y = 12

3x + y = 4

which variable should be "eliminated" first?

• x

• y

5x - y = 12

3x + y = 4

Will you add or subtract to "eliminate" the y variable?

• add

• subtract

6x + 7y = -15

6x - 2y = 12

which variable should be "eliminated" first?

• x

• y