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Maths Video Lesson 1 Revision eNotes Worksheet and Solutions

Contents

3rd Year Worksheet 1 and Solutions 4

Example 1 & Example 2 4

Example 3 &Example 4 4

Example 5 5

Example 6 &Example 7 5

Example 8 6

Example 9 6

Example 10 7

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3rd Year Worksheet 1 and Solutions

Now at this stage you should have watched the free Lesson 1 maths tutorial on linear equations and read the iRevise.com lesson 1 revision notes. We are now bringing you a worksheet and solutions.

Example 1 Example 2

Solve 3 ( 2x + 6) = 7 (20 – 10x)

6x + 18 = 140 70x

6x + 70x = 140 18

76x = 122

x =

= = 1.605

Solve 4x 7 = 8 + 2x

4x 3x = 8 + 7

2x = 15

x = = 7.5

Example 3 Example 4

Solve 6(5x) + 3 = 3 2x

30 x + 3 = 3 2x

33 6x = 3 2x

33 + 3 = 2x + 6x

36 = 4x

= x

9 = x

Solve this rectangle for x.

3x 11

5x

5x = 3x 9 + 11

5x = 3x + 2

5x 3x = 2

2x = 2

X = = 1

Example 5

Orla will be x years old on her next birthday. Sean will then be 4 years younger than oral.

(i) Write Johns age in terms of x.

(ii) If the sum of their ages is 32, find how old oral will be on her next birthday.

(i) Orla = x (ii) Sum = 32

Sean = x 4 x + x 4 = 32

2x 4 = 32

2x = 32 + 4

2x =...

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