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Mathematics 23 Online
OpenStudy (anonymous):

Help me pwease :'( Equations With Variables On Both Sides

OpenStudy (anonymous):

The work of a student trying to solve the equation 2(2x − 3) = 6 + 2x + 4 is shown below: Step 1: 2(2x − 3) = 6 + 2x + 4 Step 2: 4x − 3 = 10 + 2x Step 3: 4x − 2x = 10 + 3 Step 4: 2x = 13 Step 5: x = 6.5 In which step did the student first make an error and what is the correct step? Step 2: 4x − 6 = 10 + 2x Step 2: 4x − 3 = 2 + 2x Step 3: 4x + 2x = 10 + 3 Step 3: 4x − 2x = 10 - 3

OpenStudy (anonymous):

Ill make a guess ;-;

OpenStudy (welshfella):

can you see the error in step 2?

OpenStudy (anonymous):

o.o i thought it was step 2 xD

OpenStudy (anonymous):

i think ;-;

OpenStudy (anonymous):

its step 2

OpenStudy (welshfella):

4x + 3 is not correct - can you see why?

OpenStudy (welshfella):

* sorry 4x - 3 is not correct

OpenStudy (welshfella):

he distributed the 2 over the 2x - 3 and multiplied 2*2x = 4x that was correct. Then the mistake happened.

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