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Evaluate 3/7r + 5/8s when r = 14 and s = 8
The answer is 6+5=11

I don't understand the solution. I am confused as to what I thought was multiplying fractions with whole numbers, which I thought you multiply the variable(whole number) by the numerator, whereas the solution in this case for the numerator is just a repeat of the variable. I've included a wiki post on multiplying fractions with whole numbers.

Evaluate 37r 58s when r 14 and s 8 The answer is 6511 I dont understand the solution I am confused as to what I thought was multiplying fractions with whole num class=
Evaluate 37r 58s when r 14 and s 8 The answer is 6511 I dont understand the solution I am confused as to what I thought was multiplying fractions with whole num class=

Respuesta :

[tex] \frac{3}{7}*r + \frac{5}{8} *s [/tex]

let us first plug the values of r and s here

r=14 and s=8

[tex] \frac{3}{7}*14 + \frac{5}{8} *8 [/tex]

Now here we can cancel 14 and 7 as 7*2 =14 , also we can cancel 8 and 8 as 8*1 is 8, so our simplified new form is:

[tex] \frac{3}{1}*2 + \frac{5}{1} *1 [/tex]

Now we can multiply 3*2 and 5*1

3*2 =6

5*1=5

Next we add the two numbers

6+5 =11

So this is how we get the answer 11

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