Maths · KS3 Y7 · Algebra

Inverse operations

Inverse operationsFree13:57Heddy Score 3 of 7, below the standard

What you need to know

  • Expand any brackets first by multiplying the outside term by every term inside.
  • Collect like terms on each side of the equation.
  • If the unknown is on both sides, remove the smaller x-term so the coefficient stays positive.
  • Use inverse operations in reverse order to isolate the unknown, doing the same to both sides.
  • Check the answer by substituting it back into the original equation.

In this clip

0:05–13:42Equations with brackets
Also coversInverse operations
Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

409K views · 4.88K likes · Math with Mr. J 2.03M subscribers

As reported by YouTube on 2026-11-03. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

Two fully worked equations with brackets, each checked by substitution, model a reliable step-by-step method.

Math with Mr. J on YouTubechecked 2026-10-22

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