Balance
The equation starts as x + 3 = 10. Subtract the same amount from both sides.
Left 10, right 10. The pans match only if you remove the same amount. Removing 2 leaves x + 1 = 8, which is still true but not yet solved.
The equation starts as x + 3 = 10. Subtract the same amount from both sides.
Left 10, right 10. The pans match only if you remove the same amount. Removing 2 leaves x + 1 = 8, which is still true but not yet solved.