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mezya [45]
3 years ago
10

The work of a student to solve the equation 3(3x − 4) = 8 + 2x + 5 is shown below: Step 1. 3(3x − 4) = 8 + 2x + 5 Step 2. 6x − 7

= 13 + 2x Step 3. 6x − 2x = 13 + 7 Step 4. 4x = 20 Step 5. x = 5 In which step did the student first make an error and what is the correct step? Step 2, 9x − 12 = 13 + 2x Step 2, 9x − 4 = 2(6 + x + 3) Step 3, 6x + 2x = 13 + 7 Step 3, 6x − 2x = 13 − 7
Mathematics
2 answers:
Nutka1998 [239]3 years ago
5 0
Welll 12 is the power of 12 so the sum of 32 is 12
Sauron [17]3 years ago
4 0
Student made an error in step 2. Correct step is 9x - 12 = 13 + 2x.
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