Verified answer

an algabreic equation

2x + 5(x - 1) = 9 when x = 2.

2x + 5(2 - 1) = 9

2x + 5 = 9

2(2) + 5 = 9

4 + 5 = 9

9 = 9.

Replace x with 2 and evaluate.

2(2) + 5 ( 2-1) = 9

4+5 (1) = 9

9 = 9

Easy replace the variable (x) with 2 so you get 2(2) + 5 (2-1)

Then you get 10-5 which equals 5. So go back 2(2) + 5 equals 9 done

2x+5(x-1)=9 ; x = 2

2x + 5x - 5 = 9

7x = 14

x = 14/7 = 2

i´m not entirely sure though

2 is the root of the equation.