Equations are balances
Equations are balances

The diagram shows an equation as a balance: x+7x+7x+7 on one side and 191919 on the other. If you subtract 777 from both sides, the balance stays equal and xxx is left on its own.
Step-by-step lessons on OCR GCSE Maths Solving One Step Equations. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.