7r – 7 = 2r + 18
To solve the equation, you need to isolate the variable on one side of the equation.
First, start by adding 7 to both sides of the equation to get rid of the -7 on the left side:
7r - 7 + 7 = 2r + 18 + 7
Simplifying the equation:
7r = 2r + 25
Next, subtract 2r from both sides to move all the terms with r to one side:
7r - 2r = 2r - 2r + 25
Simplifying the equation:
5r = 25
Finally, divide both sides of the equation by 5 to solve for r:
5r/5 = 25/5
Simplifying the equation:
r = 5