13022022 Solving simultaneous linear equations 2 Objectives Be

13/02/2022 Solving simultaneous linear equations 2 Objectives Be able to solve simultaneous equations Complete any 2 of these Use methods of substitution and elimination Keywords Simultaneous, substitute, eliminate, variable, unknown

13/02/2022 Discussion Objectives Be able to solve simultaneous equations Use methods of substitution and elimination We have already looked at the elimination method. What do you think the substitution method of solving simultaneous equations entails? The substitution method means rewriting one of the equations to make one of our unknowns the subject of the equation. We can then substitute that equation into the remaining equation and solve it Keywords Simultaneous, substitute, eliminate, variable, unknown

13/02/2022 Solve the following simultaneous equations Objectives Be able to solve simultaneous equations (1) (2) Now I will substitute into (1) Use methods of substitution and elimination Keywords Simultaneous, substitute, eliminate, variable, unknown

Solve the following simultaneous equations 13/02/2022 (1) Objectives Be able to solve simultaneous equations Use methods of substitution and elimination (2) Collect like terms -3 Substitute in (2) It is a good idea to check your solutions in the second equation Keywords Simultaneous, substitute, eliminate, variable, unknown

13/02/2022 5 Steps to remember Objectives Be able to solve simultaneous equations Use methods of substitution and elimination 1)Rearrange to make one unknown the subject 2)Substitute into the other equation 3)Solve the equation to find 1 of the unknowns 4)Substitute to find the 2 nd unknown 5)Check with the other equation to make sure you are correct Keywords Simultaneous, substitute, eliminate, variable, unknown

13/02/2022 Thinking task Objectives Be able to solve simultaneous equations Use methods of substitution and elimination Consider how you would come up with a set of instructions to help you remember how to solve simultaneous equations using the substitution method You have 1 minute Now in groups of 3 or 4, outline your set of instructions on the sheet of A 3 paper that you have been given You have 3 minutes Keywords Simultaneous, substitute, eliminate, variable, unknown

Practice the skill Objectives Be able to solve simultaneous equations Use methods of substitution and elimination Keywords Simultaneous, substitute, eliminate, variable, unknown 13/02/2022

13/02/2022 Objectives Be able to solve simultaneous equations Use methods of substitution and elimination In pairs Complete either the treasure hunt or the jigsaw Keywords Simultaneous, substitute, eliminate, variable, unknown

13/02/2022 Complete your Objectives Be able to solve simultaneous equations Use methods of substitution and elimination WWW and HTI Keywords Simultaneous, substitute, eliminate, variable, unknown