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Still Confused?

Try reviewing these fundamentals first

Still Confused?

Try reviewing these fundamentals first

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Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started Now- Lesson: 13:40
- Lesson: 23:26
- Lesson: 31:59

Unknown sometimes is mysterious or even scary, but let us show you unknown can be fun too. You will find more linear equations word problems related to unknown number in this lesson.

Basic Concepts: Applications of linear equations, Solving systems of linear equations by graphing, Solving systems of linear equations by elimination, Solving systems of linear equations by substitution

Related Concepts: System of linear equations, System of linear-quadratic equations, Graphing systems of linear inequalities

- 1.Two numbers have a sum of 24. Find the two numbers if the second number is 6 times the first one.
- 2.The sum of four times one number plus two times a second number is eight. The sum of three times the first number plus 5 times the second number is 24. Find the numbers.
- 3.Sarah is three times as old as her sister Jenny. In nine years the sum of their ages will be 26. How old are they now?

17.

Simultaneous Equations

17.1

Determining number of solutions to linear equations

17.2

Solving simultaneous linear equations by graphing

17.3

Solving simultaneous linear equations by elimination

17.4

Solving simultaneous linear equations by substitution

17.5

Money related questions in linear equations

17.6

Unknown number related questions in linear equations

17.7

Distance and time related questions in linear equations

17.8

Rectangular shape related questions in linear equations

17.9

Simultaneous linear-quadratic equations

17.10

Simultaneous quadratic-quadratic equations

17.11

Solving 3 variable simultaneous equations by substitution

17.12

Solving 3 variable simultaneous equations by elimination

17.13

Solving 3 variable simultaneous equations with no solution, infinite solutions

17.14

Word problems relating 3 variable simultaneous equations

We have over 1720 practice questions in GCSE Maths for you to master.

Get Started Now17.1

Determining number of solutions to linear equations

17.3

Solving simultaneous linear equations by elimination

17.4

Solving simultaneous linear equations by substitution

17.5

Money related questions in linear equations

17.6

Unknown number related questions in linear equations

17.7

Distance and time related questions in linear equations

17.8

Rectangular shape related questions in linear equations

17.9

Simultaneous linear-quadratic equations

17.10

Simultaneous quadratic-quadratic equations