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How do you solve #4/5a = -20#?

Answer 1

#a = -25#

To solve for the variable #a#, we have to isolate it (make it by itself). To do so, multiply both sides by #5/4# so that the #4/5# multiplied to the #a# will cancel out: #4/5a color(blue)(*5/4) = -20 color(blue)(*5/4)#

Therefore, #a = -25#

I hope this is useful.

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Answer 2

Eli Assouline

To solve 4/5a = -20, multiply both sides of the equation by the reciprocal of 4/5, which is 5/4:

( \frac{5}{4} \times \frac{4}{5}a = -20 \times \frac{5}{4} )

This simplifies to:

( a = -25 )

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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.