Algebra: linear equations
Navigait original notes. Not a past paper and not affiliated with any exam board. The method is more valuable than the answer.
A linear equation in one unknown has the unknown to the power 1. The aim is to get the unknown alone on one side. Every line of working should still be an equation. If a line is not equal on both sides, you have slipped.
Do the same operation to both sides. Add or subtract first to collect terms, then multiply or divide. If the unknown is in a fraction, multiply…