To solve the equation 7r - 7 = 2r + 18, we need to isolate the variable r. Let's proceed with the steps:
1) Subtract 2r from both sides:
7r - 2r - 7 = 2r - 2r + 18
5r - 7 = 18
2) Add 7 to both sides:
5r - 7 + 7 = 18 + 7
5r = 25
3) Divide both sides by 5:
(5r)/5 = 25/5
r = 5
Therefore, the solution to the equation is r = 5. So the correct answer is r = 5.
Multiple Choice
Solve the equation. Round to the nearest tenth if necessary.
7r - 7 = 2r + 18
(1 point)
Responses
• r = -5
• r = 5
• r = 2.2
• r = 1.2
1 answer