Simultaneous equations in three unknowns (AQA GCSE Further Maths): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
How many equations do you need to find unique values for three unknowns?
How many equations do you need to find unique values for three unknowns?
Exactly three equations
What are the three variables usually called in three-unknown problems?
What are the three variables usually called in three-unknown problems?
, ,
What is the key rule for Steps 1 and 2 of the elimination method?
What is the key rule for Steps 1 and 2 of the elimination method?
Eliminate the same variable
In Step 1, what should you do?
In Step 1, what should you do?
Combine two equations to eliminate one variable
After completing Steps 1 and 2, what do you have?
After completing Steps 1 and 2, what do you have?
Two equations with two unknowns
What do you do in Step 4 of the method?
What do you do in Step 4 of the method?
Substitute back to find third variable
Which variable should you choose to eliminate first?
Which variable should you choose to eliminate first?
The easiest one to eliminate
How should you verify your final solution?
How should you verify your final solution?
Substitute into all three originals
What might you need to do before applying the elimination method?
What might you need to do before applying the elimination method?
Rearrange equations into standard form
Why should you show working clearly in exams?
Why should you show working clearly in exams?
For partial marks even with errors
What is true about the elimination method?
What is true about the elimination method?
It's systematic and reliable