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Exercise

$-120=-8\left(2r+1\right)$

Step-by-step Solution

1

Solve the product $-8\left(2r+1\right)$

$-120=-16r-8$
2

Rearrange the equation

$-16r-8=-120$
3

We need to isolate the dependent variable $r$, we can do that by simultaneously subtracting $-8$ from both sides of the equation

$-16r-8+8=-120+8$
4

Canceling terms on both sides

$-16r=-112$
5

Divide both sides of the equation by $-16$

$r=7$

Final answer to the exercise

$r=7$

Try other ways to solve this exercise

  • Choose an option
  • Solve for r
  • Find the derivative using the definition
  • Solve by quadratic formula (general formula)
  • Simplify
  • Find the integral
  • Find the derivative
  • Factor
  • Factor by completing the square
  • Find the roots
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Main Topic: One-variable linear equations

Algebraic equations that have just one variable.

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