Question

If x=-3/8 then find the value of (a) 2x+5 (b) x+3/8 (c) 5-(-x) ​

Answer 1

Step-by-step explanation:

$x = - \frac{3}{8} \\ \\ 1. \: 2x + 5 = 2( \frac{ - 3}{8} ) + 5 \\ \\ \frac{ - 6}{8} + 5 = \frac{ - 6 + 40}{8} \\ \\ \frac{34}{8} = \frac{17}{4}$

$2. \: \frac{x + 3}{8} \\ \\ \frac{ \frac{ - 3}{8} + 3 }{8} = \frac{ \frac{ - 3 + 24}{8} }{8} = 24 - 3 = 21$

$3. \: 5 - ( - x) = 5 + x \\ \\ 5 - \frac{3}{8} = \frac{40 - 3}{8} = \frac{37}{8}$