Question

Find the numerical value of the expression for a)x=4 and b)x=18
\[\frac{ 5x-3 }{ 8x }\] Help please ?

Answer 1

Let's do x = 4 together.
First, rewrite the expression substituting 4 for x.
Can you show what you get?

Answer 2

ok

Answer 3

\[\frac{ 5(4)-3 }{ 8(4) }\]

Answer 4

Great. That is the first step.
Now do the multiplications in both the numerator and denominator, and show what you get.

Answer 5

i get \[\frac{ 20-3 }{ 32 }\]

Answer 6

Correct. Again.
The final step is to do the subtraction in the numerator.

Answer 7

do i subract the 20-3 and divide that by 32 ?

Answer 8

no

Answer 9

Just do the subtraction and write it as a fraction.

Answer 10

ok

Answer 11

so \[\frac{ 17 }{ 32 }\]

Answer 12

?

Answer 13

That is the final answer.
Now do the same procedure for x = 18

Answer 14

okay got it . thanks

Answer 15

You're welcome.

Answer 16

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If you want, just copy the pic and fill in the right side.