Question

Simplify the expressions and find the value if x = 3. i) 3x+5-x+9 ii) 10-5x+2

Answer 1

$x = 3$

$1) = 3x + 5 - x + 9$

$=3(3) + 5 - 3 + 9$

$= 9 + 5 - 3 + 9$

$= 14 + 6$

$= 20$

$2) = \: 10 - 5x + 2$

$= 10 - 5(3) + 2$

$= 10 - 15 + 2$

$= - 5 + 2$

$= - 3$