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How do you solve and write the following in interval notation: #3x+3>21#?

Answer 1

Eva Adamson

#(6,+oo)#

#"isolate 3x by subtracting 3 from both sides"#

#3xcancel(+3)cancel(-3)>21-3#

#rArr3x>18#

#"divide both sides by 3"#

#(cancel(3) x)/cancel(3)>18/3#

#rArrx>6" is the solution"#

#"in interval notation " (6,+oo)#

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Answer 2

Eli Assouline

The solution and interval notation for ( 3x + 3 > 21 ) is ( x > 6 ), represented in interval notation as ( (6, +\infty) ).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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How do you solve and write the following in interval notation: #3x+3&gt;21#?

How do you solve and write the following in interval notation: #3x+3>21#?