Answer:
[tex]x = 2[/tex]
Explanation:
[tex]7(x + 1) = 21 \\ first \: you \: need \: to \: distribute \\ \\ 7x + 7 = 21 \\ subtract \: 7 \: from \: both \: sides \\ \\ 7x = 14 \\ divide \: both \: sides \: by \: 7 \\ \\ x = 2[/tex]
x = 2
7( x + 1 ) = 21
Divide both sides by 7
x + 1 = 21 / 7
Divide 21 by 7 to get 3
x + 1 = 3
Subtract 1 from both sides
x = 3 - 1
Subtract 1 from 3 to get 2
