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Please help me get the answer

Please help me get the answer-example-1
User Solonl
by
8.2k points

2 Answers

5 votes

Answer:

a ≤ -9

Explanation:


-3a+1\geq28\qquad\text{subtract 1 from both sides}\\\\-3a+1-1\geq28-1\\\\-3a\geq27\qquad\text{change the signs}\\\\3a\leq-27\qquad\text{divide both sides by 3}\\\\a\leq-9

User Maxint
by
7.8k points
2 votes

You need to isolate a.


First subtract 1 from both sides:

-3a > 27


Then divide both sides by -3. Since you are dividing by a negative number the sign > should change to <.


The answer is a < -9


(There should be a line under the sign <.)



User Xeneka
by
8.5k points

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