Question

3(x-1)-6=15 nao entendi essa conta direito!!

Answer 1

$3(x-1)-6=15 \\ 3x-3-6=15 \\ 3x=24 \\ x=8$

Answer 2

3(x-1)-6=15
3x-3-6=15
3x=15+6+3
3x=24
x=24/3
x=8



3(8-1)-6=15
3(7)-6=15
21-6=15
15=15