Distribute −18: Distribute −18 to both terms inside the parentheses.−18(a+12)−5≤13−18×a+(−18)×12−5≤13−18a−216−5≤13
Combine like terms: Combine like terms on the left side of the inequality.−18a−216−5≤13−18a−221≤13
Add 221: Add 221 to both sides of the inequality to isolate the term with the variable a.−18a−221+221≤13+221−18a≤234
Divide and reverse inequality: Divide both sides of the inequality by −18 to solve for a. Remember to reverse the inequality sign because we are dividing by a negative number.−18−18a≥−18234a≥−13
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