Solving system of Equations

Solving system of Equations

Lesson objective:

Solve system of equations by elimination using addition and subtraction

Poll

How was your spring bring break

Poll

Warm up question

what is the intersection point of the two lines in the image ?

• (-1,1)

• (1,-1)

• (2,0)

Open Ended

How can you describe the graph ?

what does the intersection point indicate ?

Multiple Choice

Is the point (2,1) the solution of

x+y=3

3x-y=5

• yes

• No

Multiple Choice

There are 50 donkeys and chickens on a far. There are a total of 174 legs. Which system below can be used to figure out how many of each animal the farm has?

• d + c = 174

  4d + 2c = 50

• d + c = 50

  4d + 2c = 174

• d + c = 50

  2d + 4c = 174

• d + c = 174

  2d + 4c = 50

Multiple Choice

Solve by elimination

7x+y=-9

-3x-y=5

• No solution

• (1,8)

• (-2,-3)

• (-1,-2)

Open Ended

what are the obstacles of applying elimination directly in the system below

10x+5y=30

3y=5x+7