Ask Question
MathematicsMathematics
20 January, 17:43

The work of a student to solve the equation 2 (4x - 4) = 8 + 4x + 4 is shown below: Step 1. 2 (4x - 4) = 8 + 4x + 4 Step 2. 6x - 6 = 12 + 4x Step 3. 6x - 4x = 12 + 6 Step 4. 2x = 18 Step 5. x = 9 In which step did the student first make an error and what is the correct step? Step 2, 8x - 6 = 2 (6 + 2x + 2) Step 2, 8x - 8 = 12 + 4x Step 3, 6x - 4x = 12 - 6 Step 3, 6x + 4x = 12 + 6

+1
Answers (1)
  1. 20 January, 18:08
    0
    Answer is step 2, 8x - 8 = 12 + 4x

    The student did not distribute the 2 into the parentheses properly which ruined their entire problem. With 2 (4x-4), you must multiply everything in parentheses by 2.

    so 2 x 4x = 8x

    2 x - 4 = - 8

    making it 8x - 8 = 12 + 4x (on the right side all you did was combine like terms)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The work of a student to solve the equation 2 (4x - 4) = 8 + 4x + 4 is shown below: Step 1. 2 (4x - 4) = 8 + 4x + 4 Step 2. 6x - 6 = 12 + ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
Evaluate 4 (6) + 7 (5 - 3) A: 118 B: 80 C: 10 D: 38
Answers (2)
A soccer club spent $97.50 on trophies from a custom trophy company. The cost of manufacturing x custom trophies is $18.50 for the setup cost, plus $12.50 per trophy. To ship the trophies, the company charges a standard fee of $4 per order plus $2.
Answers (1)
Renauld has to pay 2 percent in closing costs and 14 percent for the down payment on a purchase of $170,500. Over the life of his loan, he will pay $163,021.87. What is the total cost of his house?. A. $166,431.87. B. $186,891.87. C. $190,301.87
Answers (1)
A race car has a top speed of 330 km/hr. What speed is that in miles/sec? A) 0.015 miles/sec B) 0.057 miles/sec C) 0.15 miles/sec D) 0.57 miles/sec
Answers (1)
There were 6 Men. Each men had 6 bags. Each bag had 6 cats. Each cat had 6 kittens. How many legs?
Answers (2)
New Questions in Mathematics
What are zeros of f (x) = (x-3) (x+8) ?
Answers (1)
Find the missing measures for the rectangle. l = _?_ w = 2 cm A = _?_ P = 25 cm A) 12.5 cm; 25 cm2 B) 10.5 cm; 21 cm2 C) 12.5 cm; 21 cm2 D) 10.5 cm; 25 cm2
Answers (1)
A lottery offers two options for the prize. Option A: $1000 a week for life. Option B: $600 000 in one lump sum. Which option would the winner choose if s/he expects to live for another 50 years?
Answers (1)
Write the answer in standard form on the line. 100,000 less than five hundred sixty thousand, three hundred thirteen is
Answers (1)
Solve the inequality. -6 < 2 x - 4 < 4 A) - 5 < x < 0 B) - 4 < x < 6 C) - 1 < x < 4 D) - 12 < x < - 2
Answers (1)
Home » Mathematics » The work of a student to solve the equation 2 (4x - 4) = 8 + 4x + 4 is shown below: Step 1. 2 (4x - 4) = 8 + 4x + 4 Step 2. 6x - 6 = 12 + 4x Step 3. 6x - 4x = 12 + 6 Step 4. 2x = 18 Step 5.
Sign Up Forgot Password?