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Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math 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.

- 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?

8.

Simultaneous Equations

8.1

Determining number of solutions to linear equations

8.2

Solving simultaneous linear equations by graphing

8.3

Solving simultaneous linear equations by elimination

8.4

Solving simultaneous linear equations by substitution

8.5

Money related questions in linear equations

8.6

Unknown number related questions in linear equations

8.7

Distance and time related questions in linear equations

8.8

Rectangular shape related questions in linear equations

8.9

Simultaneous linear-quadratic equations

8.10

Simultaneous quadratic-quadratic equations

8.11

Solving 3 variable simultaneous equations by substitution

8.12

Solving 3 variable simultaneous equations by elimination

8.13

Solving 3 variable simultaneous equations with no or infinite solutions

8.14

Word problems relating 3 variable simultaneous equations

We have over 600 practice questions in AU General Maths for you to master.

Get Started Now8.1

Determining number of solutions to linear equations

8.3

Solving simultaneous linear equations by elimination

8.4

Solving simultaneous linear equations by substitution

8.5

Money related questions in linear equations

8.6

Unknown number related questions in linear equations

8.7

Distance and time related questions in linear equations

8.8

Rectangular shape related questions in linear equations

8.9

Simultaneous linear-quadratic equations

8.10

Simultaneous quadratic-quadratic equations