Question

Simplyfy when x = -2: (a)3x-5-x+9x+4

Answer 1

3x-5-x+9x+4
=3×-2-5-×(-2)+9×-2+4
=-6-(-10)+(-18)+4
=-6+10-18+4
=4-18+4
=4-14
=-10 ans.

Answer 2

Given x=-2
3x-5-x+9x+4
=3x+9x-x-5+4
=11x-1
now substitute the value of x
11(-2)-1
=-22-1
=-23