Question

Mathematics

In the problem below, which line contains an error?

Line 1:

Line 2:

Line 3:

Line

Line 5:

Line 2

Line 3

Line 4

Line 5

Line 1:

Line 2:

Line 3:

Line

Line 5:

Line 2

Line 3

Line 4

Line 5

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Best Answer

The error is in Line 4.

The equations before line 4 are correct simplifications of the original equation.

However, to isolate , we need to subtract from both sides of the equation, not add :

Dividing both sides by , we get:

Therefore, the correct line 4 should be:

The error is that was mistakenly added instead of subtracted from both sides of the equation in line 4.

The equations before line 4 are correct simplifications of the original equation.

However, to isolate

Dividing both sides by

Therefore, the correct line 4 should be:

The error is that