Using mental math, solve the inequality 7+a>5+6 . In the solution set, the variable a must be greater than what number?
To solve the inequality 7 + a > 5 + 6, we first simplify both sides:
7 + a > 11
Next, we subtract 7 from both sides:
a > 4
Therefore, in the solution set the variable a must be greater than 4.