Question

Determine x. 9x+9+3x=15

Answer 1

9x+9+3x=15
12x=15-9
12x= 6
x=6/12
x=1/2

Answer 2

9x+9+3x=15

9x+3x=15-9

12x=6

x=6/12


x=6/12


Simplifique por 6

$\frac{6/6}{12/6} = \frac{1}{2}$


R:1/2