Simplify the following expression and find the value when $x = 3$
$8 - 6 x + 4 x + 3$

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Solution

Step 1 : Simplify the given expression
Given expression is
$8 - 6 x + 4 x + 3$
On simplifying the expression,
$8 - 6 x + 4 x + 3 = (8 + 3) + (- 6 x + 4 x) . . . (g r o u p i n g t h e l i k e t e r m s) = 11 + (- 2 x) = 11 - 2 x$
Step 2- Substitute the value of $x$ in simplified equation
putting the value $x = 3 i n 11 - 2 x$
$= 11 - 2 (3) = 11 - 2 \times 3 = 11 - 6 = 5$
Hence, the required solution is $5$

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