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How do you solve #-4x-7=21#?

Answer 1

Eva Adamson

Isolate #x#.

To do this, let's add #7# to each side:

#-4x=28#

Next, let's divide each side by #-4#:

#(-4x)/-4=28/-4#

#x=-7#

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Answer 2

Eli Assouline

To solve the equation -4x - 7 = 21, first, add 7 to both sides of the equation to isolate the term with x. Then, divide both sides by -4 to find the value of x. The solution is x = -7.5.

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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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