Solving Systems Algebraically

What is the solution of the system of equations when solving by substitution,

𝑦 + 3𝑥 = −4

𝑦 − 2𝑥 = 11?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The cost of a math textbook and workbook is $135. The price of the textbook is 10 more than 4 times the price of the workbook. What is the cost of the workbook?

• $25

• $40

• $105

• $110

Tags

CCSS.8.EE.C.7B

What is the solution of the system of equations when solving by elimination,

5𝑥+ 3𝑦  = −21

−3𝑥 + 2𝑦 = 24 ?

• (-3, 6)

• (-6, 3)

• (8, 12)

• (12, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using elimination. What is the value of x?:

2𝑥 + 𝑦 = 1

3𝑥 − 4𝑦 =

• 5

• -5

• 2

• -2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What system of equations has infinitely many solutions?

• 3𝑥 − 2𝑦= −6

  −6𝑥 + 4𝑦 = −12

• 𝑥 − 2𝑦 = 6

  𝑥 + 4𝑦 = −12

• 2𝑥 − 2𝑦 = 6

  −2𝑥 + 4𝑦 = −12

• 3𝑥 − 2𝑦 = 6

  −6𝑥 + 4𝑦 = −12

Tags

CCSS.8.EE.C.8B