Question

The steps below show the incomplete solution to find the value of x for the equation 7x − 3x − 4 = −1 + 21:

Step 1: 7x − 3x − 4 = −1 + 21
Step 2: 7x − 3x − 4 = 20
Step 3: 4x − 4 = 20

Which of these is most likely the next step?

Answer 1

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7x - 3x - 4 = -1 + 21

7x - 3x - 4 = 20

4x - 4 = 20

$\tt\bf\red{4x = 20 + 4}$

$\tt\bf\red{x = 20/4 = 5}$