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2 years ago

92 = -4(2r - 5) r = ? Help!

Mathematics

2 answers:

Sloan [31]2 years ago

6 0

First to get rid of the parantheses we must multiply -4 times any number inside of the parantheses.

92=-4(2r-5)

92=-8r+20

Next subtract 20 from both sides

92=-8r+20

72=-8r

Divide both sides by -8

72=-8r

72/-8=-8r/-8

-9=r

Our final answer is -9

Hope this helps!

Roman55 [17]2 years ago

5 0

Hello there!

$92 = -4(2r - 5)\\$

Explanation:

↓↓↓↓↓↓↓↓↓↓↓↓

First you had to switch sides.

$-4(2r-5)=92$

Then you divide by -4 from both sides of the equation.

$\frac{-4(2r-5)}{-4}=\frac{92}{-4}$

Simplify

$2r-5=-23$

Next you had to add by 5 from both sides of the equation.

$2r-5+5=-23+5$

Simplify

$2r=-18$

You can also divide by 2 from both sides of the equation.

$\frac{2r}{2}=\frac{-18}{2}$

Simplify it should be the correct answer.

$r=-9$

Answer⇒⇒⇒⇒⇒r=-9

Hope this helps!

Thank you for posting your question at here on Brainly.

Have a great day!

-Charlie

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