Answer
r=0.25
↓Steps Explained:↓
Solve for r
9r = 3 - 3r
Group variables
Group our variables 9r and -3r
add 3r to both sides
9r + 3r = -3r + 3 + 3r
Cancel -3r on the right side:
12r = 3
Divide each side by 9
| 9r | |
| 9 |
| = |
| 3 |
| 9 |
Divide each side of the equation by 12
| 12r | |
| 12 |
| = |
| 3 |
| 12 |
r = 0.25
Final Answer
r=0.25Related Calculators: Literal Equations | Simultaneous Equations | 4 unknowns using Cramers Rule