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How do you solve #-9(-3r – 16) = 5r – 76#?

Answer 1

Isaiah Anthony

#color(blue)(r=-10#

#−9(−3r–16)=5r–76#

#27r + 144 =5r-76#

#27r -5r = -144-76#

#22r = -220#

#color(blue)(r=-10#

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Answer 2

Hazel Anglin

First, distribute the -9 on the left side: 27r + 144 = 5r - 76. Then, subtract 5r from both sides: 22r + 144 = -76. Next, subtract 144 from both sides: 22r = -220. Finally, divide both sides by 22: r = -10.

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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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