System of Equations by Substitution

Solve for x and y. (Show work on your answer document.) 3x + 2y = 16 7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Solve: (Show work on your answer document.)

y = 2x - 10

10x - 5y = 15

• (7 , -15)

• (1, -5)

• All real numbers

• No solution

Solve: (Show work on your answer document.)

y = 2x - 2

-x + 8y = 14

• (2, 2)

• (6, 12)

• (1, 0)

• (1, -6)

Solve: (Show work on your answer document.)

3x + 2y = 16

7x + y = 19

• (-2, 5)

• (-2, -5)

• (2, -5)

• (2, 5)

Solve: (Show work on your answer document.)

y=8x+1

y=6x+3

• (1, 9)

• (4, 14)

• (0, 1)

• (2, 4)

Identify the solution for the following.

• (0, 3)

• (3, -2)

• (-2, 3)

• (0, -3)

What is the first step in the substitution method?

• Step 2

• find the equation that is solved for the single variable

• substitute the expression into the other equation

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.

• Make sure at least one equation is solved for one variable.

• Make sure both equations are in slope-intercept form.

• Make sure both equations can be solved.

What is the solution to this equation?

• one solution

• no solution

• infinite solutions

• none of these

Which choice shows substitution correctly?

• 3x + (2x + 3) = 20

• 3x + 2y(2x + 3) = 20

• 3x + 2 (2x + 3) = 20

• y + 2x + 3 = 20