Mathematics
sophieinawe
42

The work of a student to solve the equation 3(2x − 4) = 8 + 2x + 6 is shown below: Step 1: 3(2x − 4) = 8 + 2x + 6 Step 2: 5x − 7 = 14 + 2x Step 3: 5x − 2x = 14 + 7 Step 4: 3x = 21 Step 5: x = 7 In which step did the student first make an error and what is the correct step? Step 2; 6x − 12 = 14 + 2x Step 2; 6x − 7 = 2(6 + x + 4) Step 3; 5x − 2x = 14 − 7 Step 3; 5x + 2x = 14 + 7

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(1) Answers
Shashaeffinbaby

6x-12+15+2x Hopefully thats right ;D

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