Solve the equation. Round to the nearest tenth if necessary.
7r – 7 = 2r + 18
(1 point)
Responses
r = –5
r = –5
r = 5
r = 5
r = 2.2
r = 2.2
r = 1.2
r = 5
To solve the equation 7r - 7 = 2r + 18, we need to isolate the variable r.
First, let's get rid of the constant terms. We can do this by adding 7 to both sides of the equation:
7r - 7 + 7 = 2r + 18 + 7
7r = 2r + 25
Next, we need to move all the terms containing the variable r to one side of the equation. We can do this by subtracting 2r from both sides:
7r - 2r = 2r + 25 - 2r
5r = 25
Finally, we solve for r by dividing both sides of the equation by 5:
5r/5 = 25/5
r = 5
Therefore, the solution to the equation is r = 5.
To solve the equation 7r - 7 = 2r + 18, we need to isolate the variable "r" on one side of the equation.
First, let's get rid of the constant terms on both sides by adding 7 to both sides of the equation:
7r - 7 + 7 = 2r + 18 + 7
Simplifying both sides of the equation gives us:
7r = 2r + 25
Next, let's isolate the variable "r" by subtracting 2r from both sides of the equation:
7r - 2r = 2r + 25 - 2r
Simplifying both sides of the equation gives us:
5r = 25
Finally, to solve for "r", we divide both sides of the equation by 5:
5r/5 = 25/5
Simplifying both sides of the equation gives us:
r = 5
Therefore, the solution to the equation is r = 5.