-2x+1>7

- 2 x + 1 > 7 Subtract 1 to both sides

- 2 x + 1 - 1 > 7 - 1

- 2 x > 6

________________________________________

Remark :

When you multiply or divide left and right sides of inequality WITH NEGATIVE NUMBER , you MUST CHANGE the direction of the inequality.

________________________________________

x < - 3