The work of a student trying to solve the equation 4(2x − 1) = 11 + 3x + 5 is shown below: Step 1: 4(2x − 1) = 11 + 3x + 5 Step

Question

3 years ago

11

The work of a student trying to solve the equation 4(2x − 1) = 11 + 3x + 5 is shown below: Step 1: 4(2x − 1) = 11 + 3x + 5 Step

2: 8x − 4 = 16 + 3x Step 3: 8x + 3x = 16 − 4 Step 4: 11x = 24 Step 5: x = 2.18 In which step did the student first make an error and what is the correct step?

Mathematics

2 answers:

pantera1 [17] · Answer 1 · 2022-08-31T15:35:55+03:00

pantera1 [17]3 years ago

6 0

The answer is Step 3: 8x − 3x = 16 + 4, because you have to subtract 3x not add.
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neonofarm [45] · Answer 2 · 2022-08-31T13:29:55+03:00

neonofarm [45]3 years ago

3 0

In step three the prblem was incorrect. this is because you have to add four from both sides leading to 8x=20+3x then you have to subtract 3x which is 5x=20. divinding both sides by 5 is:

X=4