Substitution of Systems

Which option correctly substituted the following Systems of Equations?

• 3(-3x + 19) - 2y = -2

• 3x + 2(-3x + 19) = -2

• 3x - 2(-3x+19) = -2

• 3x - (-3x + 19) = -2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

We know x = 4 for the following System of Equations: y = -3x + 19 3x - 2y = -2 Now Solve for y.

• y = -7

• y = 7

• y = -31

• y = 31

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the correct substitution?

x = -2y + 4

-5x + 4y = 8

• -5x + 4(-2y + 4) = 8

• -5(-2y - 4) + 4y = 8

• -5(-2y + 4) + 4y = 8

• -2y + 4 + 4y = 8

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the correct substitution?

• 2x + 3 = -3x + 3

• 2x + 3 = 3x - 3

• y = -3(2x + 3) + 3

• y = 2(-3x + 3) + 3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Find the value of (x, y) that satisfies the equations by solving the system using substitution.
 
5x + 4y= −14
y =  −7x  −  15  The solution is (a)   .

• (-2, -1)

• (0, 0)

• (1, 1)

• (2, 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following system of equations using the Substitution Method:

• (6, 31)

• (31, 6)

• (4, 21)

• (6, 11)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• A
• B
• C
• D

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system? Solve by substitution.
y= 4x + 3
2x - 3y = 21

• (3,-9)

• (-3,-9)

• (-3,9)

• (0,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The solution to the system of equations y = 2x + 1 and y = 4x - 1 is (a)   .

• (1,3)

• (0,0)

• (2,5)

• (3,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The solution to the system of equations x + 2y = 2 and x = -4y + 2 is (a)   .

• (2, 0)

• (0, 2)

• (1, 1)

• (-2, 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6