Solving the equation Let's solve this equation by transforming both sides of the equation in the same way.
{"Image DocumentName": "Solving the equationLet\u2019s solve this equation by transforming both sides of the equation in the same way.", "Image ImageDescription": "4n = n + 9. Start by writing the equation down. -n. -n. Subtract n from both sides. 3n = 9. Always line up the equals signs. \u00f73. \u00f73. Divide both sides by 3. n = 3. This is the solution. Go through these steps to solve the equation step by step: Write down the equation. We want to have the unknown n on the left hand side of the equals sign only so we should start by subtracting n from both sides of the equation. We must always perform the same operation to both sides of the equation. (We can think of an equation as a pair of balancing scales, whatever we do to one side we must do to the other to keep the two sides of the equals sign equal). 4n - n = 3n and n n = 9. This step is usually done mentally. Remember 3n means 3 \uf0b4 n. We must therefore divide both sides of the equation by 3 to \u2018undo\u2019 the multiplication by 3. 3n divided by 3 is n and 9 divided by 3 is 3.When we get to just a letter symbol equal to a value we stop. This is our solution. Lastly, we can check the solution by substituting it back into the original equation. Make sure that the left hand side of the equation is equal to the right hand side. Tell pupils that the steps shown in orange can be done mentally once they are. more confidant. Set pupils a variety of linear equations to solve with unknowns on both sides. Encourage pupils to check their answers by substituting them back into the. original equation. We can check the solution by substituting it back into the original equation: 4 \uf0b4 3 =", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}