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JSS3: MATHEMATICS - 1ST TERM

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  1. Binary Number System I | Week 1
    5 Topics
    |
    1 Quiz
  2. Binary Number System II | Week 2
    6 Topics
    |
    1 Quiz
  3. Word Problems I | Week 3
    4 Topics
    |
    1 Quiz
  4. Word Problems with Fractions II | Week 4
    1 Topic
    |
    1 Quiz
  5. Factorization I | Week 5
    4 Topics
    |
    1 Quiz
  6. Factorization II | Week 6
    3 Topics
    |
    1 Quiz
  7. Factorization III | Week 7
    3 Topics
    |
    1 Quiz
  8. Substitution & Change of Subject of Formulae | Week 8
    2 Topics
    |
    1 Quiz
  9. Simple Equations Involving Fractions | Week 9
    3 Topics
    |
    1 Quiz
  10. Word Problems | Week 10
    1 Topic
    |
    1 Quiz



Lesson Progress
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Topic Content:

  • Simple Equations Involving Fractions

To solve simple equations containing fractions, first eliminate the fractions by multiplying each term in the equation by the LCM of the denominator.

Worked Example 9.1.1:

Solve the following:

i. \( \frac{x}{12} = \scriptsize 5 \)

ii. \( \frac{x}{9} = \frac{4}{3}\)

iii. \( \frac{y \: – \: 5}{4} = \scriptsize 8 \)

iv. \( \scriptsize 2x \: – \: \normalsize \frac{x}{8} = \scriptsize 12 \frac{1}{2} \)

v. \( \frac{5x \: – \: 1}{4} = \frac{2x \: – \: 1}{2}\)

Solution

i. \( \frac{x}{12} = \scriptsize 5 \)

\( \frac{x}{12}\scriptsize \: \times \: 12 = 5 \: \times \: 12\)

\( \scriptsize x = 12 \: \times \: 5 \\ \scriptsize = 60\)

 

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