Substitution and Elimination Review

Solving Systems of Linear Equations by Substitution

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Multiple Choice

Solve the following systems of equations using substitution:

5x - 2y = 3

y = 2x

• (6, 3)

• (1, 2)

• (3, 6)

• (2, 1)

​The Goal is still the same.

- We have equations.
- The equations make up lines.
- These are called systems
- Systems have solutions
- made of x , y

WE NEED TO FIND X AND Y

Open Ended

If I tried to use substitution to solve for x and y, how would it be difficult?

Multiple Choice

Solve by elimination:
9x-4y=7

x+4y=-17

• (-1,-4)

• (-1,5)

• (7,5)
• (3,5)

Open Ended

In this problem, what would happen if you added these two together? What would be the issue?

Multiple Choice

Solve the system of Equation (x,y)
3x + 2y = –13
3x + 4y = 1 

• (-9,7)

• (7,-9)

• (4,-7)

• (-7,-4)