One line at a time, with the reason

A solver never hands over the answer. It shows each legal move and why you are allowed to make it.

Method, step by step

1. 1

   Goal: get x alone on one side.

2. 2

   The −7 is furthest from x, so undo it first. Add 7 to both sides: 3x = 18. (Reason: adding the same amount to both sides keeps the balance.)

3. 3

   Now x is multiplied by 3. Undo it by dividing both sides by 3: x = 6.

4. 4

   Substitute back to check: 3 × 6 − 7 = 18 − 7 = 11. ✓

Try these next

• 5x + 4 = 29
• 2(x − 3) = 14
• (x / 4) + 6 = 10