Chapter 4.4, Problem 72S

To determine

To find: the value of given expression

Answer to Problem 72S

The required solution is $\frac{6-9}{8+4}=\frac{-1}{4}$

Explanation of Solution

Given:

  $\frac{6-9}{8+4}$

Calculation:

To find the value of the expression

  $\frac{6-9}{8+4}$

Add separately in numerator and denominator

  $=\frac{-3}{12}$

Write the numbers as product of factors and divide out common terms

  $\begin{array}{l}=\frac{-\cancel{3}}{4.\cancel{3}}\\ =\frac{-1}{4}\end{array}$

Conclusion:

Therefore, the solution is $\frac{6-9}{8+4}=\frac{-1}{4}$