The answer is going to be 15
add the two equations together
5a+5b=25
-5a+5b=35
------------------
0 + 10b =60
divide by 10
b=6
5a + 5b = 25
5a +5(6) = 25
5a +30 =25
subtract 30 from each side
5a =-5
divide by 5
a = -1
Answer (-1,6)
or a=-1 b=6
Answer:
The correct option is option (d).
Step-by-step explanation:
Logarithms are used basically to express large number.
Rules:
Here given that,

Applying the last rule


⇒x=125-30
⇒x=95
Therefore x=95.
Which ones do you need help with?
Answer:
a) and b) satisfied the condition of the given equation.
Step-by-step explanation:
Given:
≠
+ 
Then,
≠ 
a) For a = 21, b = 4 and c = -2, then we have;
≠ 
≠ 
≠ 
≠ 
Therefore the condition of the given equation is satisfied.
b) For a = 1, b = 10 and c = 1, then we have:
≠ 
≠ 
≠ 
Therefore the condition of the given equation is satisfied.