Question

Saima is asked solving the equation 2x + 3 = 2 + x

Here is her working
2x = -1+x
3x = -1
1
3
x
Explain her mistake and find the correct answer

Answer 1

She added x to both sides instead of subtracting

x = -1

Explanation:

2x + 3 = 2 + x

Subtract 3 from both sides:

2x = -1 + x

Subtract x from both sides:

x = -1