Answer:
x=4
Step-by-step explanation:
3(x-1)=9
3x-3=9
3x=9+3
3x=12
[tex]3(x - 1) = 9[/tex]
[tex]x - 1 = 9 \div 3[/tex]
[tex]x - 1 = 3[/tex]
[tex]x = 3 + 1[/tex]
[tex] x = 4[/tex]
