Mathematics, 16.10.2019 00:50 diemiten
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?
a. step 2, 9x − 12 = 13 + 2x
b. step 2, 9x − 4 = 2(6 + x + 3)
c. step 3, 6x + 2x = 13 + 7
d. step 3, 6x − 2x = 13 − 7
Answers: 3
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Step 1. 3(3x − 4) = 8 + 2x + 5 step 2. 6x − 7 = 13 + 2x step 3. 6x − 2x = 13 + 7 step 4. 4x = 20 ste...
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