Variables on both sides worksheets

5x + 3 = 2x + 18 is the first equation that needs a decision before it needs arithmetic. These free printable worksheets practice collecting the x terms and then solving.

Variables on both sides
Variables on both sides worksheet — Whole-number solutions, free printable with answer key

The answer key prints on a separate page.

What's on this sheet

Every equation before this one has x in a single place, so the only question is what to undo. Here a child who starts by subtracting the 3 has not done anything wrong — they have just done it in an order that leaves them no better off, because there is still an x on the other side. Collecting the x terms first is the new move, and once it is done the equation is a two-step one they have already met.

Why this sheet works

Both orientations are on every sheet on purpose. 5x + 3 = 2x + 18 collects on the left and 2x + 18 = 5x + 3 collects on the right, and a page of only the first teaches "always move the right one over" — a rule that breaks on the first mirrored equation a textbook prints. Deciding which side to collect on is the skill.