If and , then what is equal to?
- A11
- B10
- C9
- D8
Solution & Step-by-step Explanation
Let's simplify the given equations:
Equation 1:
Equation 2:
From Equation 1, we know that . Substituting this into Equation 2 gives:
Now we have a system:
1.
2.
Substitute into Equation 1:
Divide the entire equation by 3:
If , then .
Therefore, .
Equation 1:
Equation 2:
From Equation 1, we know that . Substituting this into Equation 2 gives:
Now we have a system:
1.
2.
Substitute into Equation 1:
Divide the entire equation by 3:
If , then .
Therefore, .