-8r - 2 + 7r= -9solve the equation. then check the solution

• AthenaSinclair: The first step for solving this equation is to collect the like terms with an r variable.
  -r - 2 = -9
  Now move the constant to the right side of the equation and then change its sign.
  -r = -9 + 2
  Calculate the sum on the right side of the equals sign.
  -r = -7
  Then lastly,, change the signs on both sides of the equation to find your final answer.
  r = 7
  This means that the correct answer to your question is going to be r = 7.
  We can check this by putting 7 where r is in the equation. This means that in order to check this,, our equation will change to the following:
  -8(7) - 2 + 7(7) = -9
  We will first start checking this by multiplying the first two numbers together.
  -56 - 2 + 7(7) = -9
  Now multiply the 7 by the number in the parenthesis.
  -56 - 2 + 49 = -9
  Now use addition and subtraction rules to calculate the expression on the left side of the equals sign.
  -9 = -9
  This tells us that the equality us true because both sides of the equation are identical.
  Let me know if you have any further questions.
  :)